<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019fd96d-d7b8-7683-8b20-b4bf2a64ab76,g:10026d4b-9128-4d09-8269-ed6cc18a261a-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.arteris.com/role/CondensedConsolidatedStatementsofOperations" xlink:type="simple" xlink:href="aip-20260930.xsd#CondensedConsolidatedStatementsofOperations"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/CondensedConsolidatedStatementsofOperations" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019fd96d-d86a-7e45-bd37-553686564090" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_StatementTable_019fd96d-d86a-7e45-bd37-553686564090" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019fd96d-d86a-733e-ad2d-d128c0e0dc76" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019fd96d-d86a-7e45-bd37-553686564090" xlink:to="loc_srt_ProductOrServiceAxis_019fd96d-d86a-733e-ad2d-d128c0e0dc76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019fd96d-d86a-733e-ad2d-d128c0e0dc76_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019fd96d-d86a-733e-ad2d-d128c0e0dc76" xlink:to="loc_srt_ProductsAndServicesDomain_019fd96d-d86a-733e-ad2d-d128c0e0dc76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019fd96d-d86a-793d-a51b-fd54ff3c0b23" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019fd96d-d86a-733e-ad2d-d128c0e0dc76" xlink:to="loc_srt_ProductsAndServicesDomain_019fd96d-d86a-793d-a51b-fd54ff3c0b23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LicenseAndMaintenanceMember_019fd96d-d86a-7fec-a2f6-88c519a8a0b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LicenseAndMaintenanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019fd96d-d86a-793d-a51b-fd54ff3c0b23" xlink:to="loc_us-gaap_LicenseAndMaintenanceMember_019fd96d-d86a-7fec-a2f6-88c519a8a0b0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_VariableRoyaltiesMember_019fd96d-d86a-7800-8b6f-3b75f819d69d" xlink:href="aip-20260930.xsd#aip_VariableRoyaltiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019fd96d-d86a-793d-a51b-fd54ff3c0b23" xlink:to="loc_aip_VariableRoyaltiesMember_019fd96d-d86a-7800-8b6f-3b75f819d69d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_ProfessionalServicesAndOtherMember_019fd96d-d86a-7d35-96ee-1624e40406cd" xlink:href="aip-20260930.xsd#aip_ProfessionalServicesAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019fd96d-d86a-793d-a51b-fd54ff3c0b23" xlink:to="loc_aip_ProfessionalServicesAndOtherMember_019fd96d-d86a-7d35-96ee-1624e40406cd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_019fd96d-d86a-7d46-b297-864a721cb3bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_RevenuesAbstract_019fd96d-d86a-7d46-b297-864a721cb3bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fd96d-d86a-790c-a277-947e19126b63" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_019fd96d-d86a-7d46-b297-864a721cb3bd" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fd96d-d86a-790c-a277-947e19126b63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019fd96d-d86a-7bfe-819c-3dd357ac066d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019fd96d-d86a-7bfe-819c-3dd357ac066d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019fd96d-d86a-7fd0-914c-46f1d3ca53f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_GrossProfit_019fd96d-d86a-7fd0-914c-46f1d3ca53f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_019fd96d-d86a-7d63-affd-dd64847c5177" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_OperatingExpensesAbstract_019fd96d-d86a-7d63-affd-dd64847c5177" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_019fd96d-d86a-714b-abdb-f406237527ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019fd96d-d86a-7d63-affd-dd64847c5177" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_019fd96d-d86a-714b-abdb-f406237527ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_019fd96d-d86a-7cf8-9d73-e358bf7e73de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019fd96d-d86a-7d63-affd-dd64847c5177" xlink:to="loc_us-gaap_SellingAndMarketingExpense_019fd96d-d86a-7cf8-9d73-e358bf7e73de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_019fd96d-d86a-7a92-a93d-13aa905c3f35" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019fd96d-d86a-7d63-affd-dd64847c5177" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_019fd96d-d86a-7a92-a93d-13aa905c3f35" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019fd96d-d86a-71ed-80d1-a0907efb868d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019fd96d-d86a-7d63-affd-dd64847c5177" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019fd96d-d86a-71ed-80d1-a0907efb868d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019fd96d-d86a-73c5-bd8c-820a0cbd5dd4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019fd96d-d86a-7d63-affd-dd64847c5177" xlink:to="loc_us-gaap_OperatingExpenses_019fd96d-d86a-73c5-bd8c-820a0cbd5dd4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019fd96d-d86a-7b88-a279-3bfdf3591dc4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_OperatingIncomeLoss_019fd96d-d86a-7b88-a279-3bfdf3591dc4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019fd96d-d86a-7213-90bc-f0e43afdae53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019fd96d-d86a-7213-90bc-f0e43afdae53" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_019fd96d-d86a-701a-8702-7e3bbfea30bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_019fd96d-d86a-701a-8702-7e3bbfea30bc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019fd96d-d86a-7267-8ad3-bb197e1bfd9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019fd96d-d86a-7267-8ad3-bb197e1bfd9e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019fd96d-d86a-7fcd-a194-98e408b5419a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019fd96d-d86a-7fcd-a194-98e408b5419a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019fd96d-d86a-730b-9301-a9608c2c7b17" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019fd96d-d86a-730b-9301-a9608c2c7b17" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019fd96d-d86a-7184-bfa5-0f35926d01b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019fd96d-d86a-7184-bfa5-0f35926d01b8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019fd96d-d86a-727e-9a5f-9c0ed20c0a74" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_NetIncomeLoss_019fd96d-d86a-727e-9a5f-9c0ed20c0a74" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019fd96d-d86a-71f1-8ec1-e05cd4bfb5c2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_EarningsPerShareBasic_019fd96d-d86a-71f1-8ec1-e05cd4bfb5c2" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019fd96d-d86a-73c0-8133-2f3709e58165" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019fd96d-d86a-73c0-8133-2f3709e58165" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019fd96d-d86a-7b74-9537-b00311504f3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019fd96d-d86a-7b74-9537-b00311504f3f" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019fd96d-d86a-727f-8a84-c9428193cbe3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-7542-99f3-63a8473ebba2" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019fd96d-d86a-727f-8a84-c9428193cbe3" xlink:type="arc" order="15"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/CondensedConsolidatedStatementsofStockholdersEquityDeficit" xlink:type="simple" xlink:href="aip-20260930.xsd#CondensedConsolidatedStatementsofStockholdersEquityDeficit"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/CondensedConsolidatedStatementsofStockholdersEquityDeficit" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019fd96d-d86a-79b5-b7a8-17359b79afd7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019fd96d-d86a-7b47-b4b4-4c43d37c41c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-79b5-b7a8-17359b79afd7" xlink:to="loc_us-gaap_StatementTable_019fd96d-d86a-7b47-b4b4-4c43d37c41c7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019fd96d-d86a-7e71-908a-f870065f1b40" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019fd96d-d86a-7b47-b4b4-4c43d37c41c7" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019fd96d-d86a-7e71-908a-f870065f1b40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019fd96d-d86a-7e71-908a-f870065f1b40_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019fd96d-d86a-7e71-908a-f870065f1b40" xlink:to="loc_us-gaap_EquityComponentDomain_019fd96d-d86a-7e71-908a-f870065f1b40_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019fd96d-d86a-7f98-9e0b-457fb2f8105f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019fd96d-d86a-7e71-908a-f870065f1b40" xlink:to="loc_us-gaap_EquityComponentDomain_019fd96d-d86a-7f98-9e0b-457fb2f8105f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019fd96d-d86a-767e-9167-7094d35b427d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019fd96d-d86a-7f98-9e0b-457fb2f8105f" xlink:to="loc_us-gaap_CommonStockMember_019fd96d-d86a-767e-9167-7094d35b427d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019fd96d-d86a-7857-be9d-3bbda7c9dbfe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019fd96d-d86a-7f98-9e0b-457fb2f8105f" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019fd96d-d86a-7857-be9d-3bbda7c9dbfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019fd96d-d86a-7037-b6b9-55bea8894606" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019fd96d-d86a-7f98-9e0b-457fb2f8105f" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019fd96d-d86a-7037-b6b9-55bea8894606" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019fd96d-d86a-733f-9a65-c20873a829de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019fd96d-d86a-7f98-9e0b-457fb2f8105f" xlink:to="loc_us-gaap_RetainedEarningsMember_019fd96d-d86a-733f-9a65-c20873a829de" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fd96d-d86a-79b5-b7a8-17359b79afd7" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019fd96d-d86a-7c72-b874-8c5143bb711d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019fd96d-d86a-7c72-b874-8c5143bb711d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019fd96d-d86a-7958-8405-d0a485b377b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_StockholdersEquity_019fd96d-d86a-7958-8405-d0a485b377b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019fd96d-d86a-75db-b4df-b6c8bdf8ef31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019fd96d-d86a-75db-b4df-b6c8bdf8ef31" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019fd96d-d86a-7eac-8851-1c44c9fb50f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019fd96d-d86a-7eac-8851-1c44c9fb50f4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_019fd96d-d86a-7157-84bf-af8de847027c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_019fd96d-d86a-7157-84bf-af8de847027c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_019fd96d-d86a-73b6-ab93-4604e0a56cc3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_019fd96d-d86a-73b6-ab93-4604e0a56cc3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_019fd96d-d86a-74c4-b030-b4513fcfe401" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_019fd96d-d86a-74c4-b030-b4513fcfe401" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_019fd96d-d86a-7c28-a861-f5ad0513a1e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_019fd96d-d86a-7c28-a861-f5ad0513a1e4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_019fd96d-d86a-7e94-a574-a61388cf3810" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_019fd96d-d86a-7e94-a574-a61388cf3810" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_019fd96d-d86a-71a4-ac24-f160cdfb01ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_019fd96d-d86a-71a4-ac24-f160cdfb01ff" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019fd96d-d86a-782f-ae7e-2479ed2a6295" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019fd96d-d86a-782f-ae7e-2479ed2a6295" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019fd96d-d86a-79a6-be64-30661746c879" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019fd96d-d86a-79a6-be64-30661746c879" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019fd96d-d86a-7347-a7b3-47efb1b12599" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019fd96d-d86a-7347-a7b3-47efb1b12599" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_019fd96d-d86a-7335-a570-dad05f85b062" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_019fd96d-d86a-7335-a570-dad05f85b062" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_019fd96d-d86a-7de6-a9f3-f3f72b183613" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_019fd96d-d86a-7de6-a9f3-f3f72b183613" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019fd96d-d86a-7e33-abb9-4eaef51f9095" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fd96d-d86a-7a2b-b622-aa10ee2d3a91" xlink:to="loc_us-gaap_NetIncomeLoss_019fd96d-d86a-7e33-abb9-4eaef51f9095" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019fd96d-d86a-72f8-9098-d53a745e2140" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019fd96d-d86a-75b4-9089-f30d9adc60a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/BASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#BASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/BASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019fd96d-d86b-79d7-991f-807b76ff0ec6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019fd96d-d86b-79d7-991f-807b76ff0ec6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d86b-7996-afd8-e2acada00d29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019fd96d-d86b-79d7-991f-807b76ff0ec6" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d86b-7996-afd8-e2acada00d29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d86b-7996-afd8-e2acada00d29_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d86b-7996-afd8-e2acada00d29" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d86b-7996-afd8-e2acada00d29_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d86b-7b82-8e44-7e52c6bf435b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d86b-7996-afd8-e2acada00d29" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d86b-7b82-8e44-7e52c6bf435b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CycuityInc.Member_019fd96d-d86b-7945-931d-bf5ffbb13eb1" xlink:href="aip-20260930.xsd#aip_CycuityInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d86b-7b82-8e44-7e52c6bf435b" xlink:to="loc_aip_CycuityInc.Member_019fd96d-d86b-7945-931d-bf5ffbb13eb1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019fd96d-d86b-758b-b258-82bf6a42244e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019fd96d-d86b-79d7-991f-807b76ff0ec6" xlink:to="loc_us-gaap_AwardTypeAxis_019fd96d-d86b-758b-b258-82bf6a42244e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d86b-758b-b258-82bf6a42244e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019fd96d-d86b-758b-b258-82bf6a42244e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d86b-758b-b258-82bf6a42244e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d86b-7cd5-9518-411c4c370633" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019fd96d-d86b-758b-b258-82bf6a42244e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d86b-7cd5-9518-411c4c370633" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_019fd96d-d86b-7de8-a652-b52405b9ef07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d86b-7cd5-9518-411c4c370633" xlink:to="loc_us-gaap_EmployeeStockMember_019fd96d-d86b-7de8-a652-b52405b9ef07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019fd96d-d86b-77d7-ba77-9382405c3a80" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019fd96d-d86b-79d7-991f-807b76ff0ec6" xlink:to="loc_srt_RangeAxis_019fd96d-d86b-77d7-ba77-9382405c3a80" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fd96d-d86b-77d7-ba77-9382405c3a80_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019fd96d-d86b-77d7-ba77-9382405c3a80" xlink:to="loc_srt_RangeMember_019fd96d-d86b-77d7-ba77-9382405c3a80_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fd96d-d86b-7a67-b1af-71062290a1b3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019fd96d-d86b-77d7-ba77-9382405c3a80" xlink:to="loc_srt_RangeMember_019fd96d-d86b-7a67-b1af-71062290a1b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019fd96d-d86b-709e-b74c-27aee0cba102" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019fd96d-d86b-7a67-b1af-71062290a1b3" xlink:to="loc_srt_MinimumMember_019fd96d-d86b-709e-b74c-27aee0cba102" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019fd96d-d86b-72f1-9c74-186c945038ea" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019fd96d-d86b-7a67-b1af-71062290a1b3" xlink:to="loc_srt_MaximumMember_019fd96d-d86b-72f1-9c74-186c945038ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019fd96d-d86b-7fa2-bce9-4d731847736e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019fd96d-d86b-7fa2-bce9-4d731847736e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_019fd96d-d86b-720a-82eb-f58c5d28de62" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_019fd96d-d86b-720a-82eb-f58c5d28de62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_NumberOfFinancialInstitutions_019fd96d-d86b-7ba7-bb1c-4144c2c5f76c" xlink:href="aip-20260930.xsd#aip_NumberOfFinancialInstitutions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_aip_NumberOfFinancialInstitutions_019fd96d-d86b-7ba7-bb1c-4144c2c5f76c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019fd96d-d86b-7fb8-bf4d-0986d7212453" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019fd96d-d86b-7fb8-bf4d-0986d7212453" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_019fd96d-d86b-759f-8996-5ad196454c4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_019fd96d-d86b-759f-8996-5ad196454c4d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019fd96d-d86b-7673-8ad9-77337b382560" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019fd96d-d86b-7673-8ad9-77337b382560" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019fd96d-d86b-72b1-a8e5-420ca90523ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019fd96d-d86b-72b1-a8e5-420ca90523ae" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod_019fd96d-d86b-7b71-9a04-53f386840c43" xlink:href="aip-20260930.xsd#aip_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_aip_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod_019fd96d-d86b-7b71-9a04-53f386840c43" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_019fd96d-d86b-72b8-9c81-424488bfaa46" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_019fd96d-d86b-72b8-9c81-424488bfaa46" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_LicensingArrangementPeriod_019fd96d-d86b-7e7c-9923-9cadafb8a58a" xlink:href="aip-20260930.xsd#aip_LicensingArrangementPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_aip_LicensingArrangementPeriod_019fd96d-d86b-7e7c-9923-9cadafb8a58a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_SoftwareLicensePeriod_019fd96d-d86b-72ee-95ab-7988fb521681" xlink:href="aip-20260930.xsd#aip_SoftwareLicensePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_aip_SoftwareLicensePeriod_019fd96d-d86b-72ee-95ab-7988fb521681" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_NumberOfPerformanceObligations_019fd96d-d86b-7b89-a9ab-d766a5cabd6d" xlink:href="aip-20260930.xsd#aip_NumberOfPerformanceObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fd96d-d86b-7bba-96e5-77843c4ebe3e" xlink:to="loc_aip_NumberOfPerformanceObligations_019fd96d-d86b-7b89-a9ab-d766a5cabd6d" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/BASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofAccountsReceivableConcentrationRiskDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#BASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofAccountsReceivableConcentrationRiskDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/BASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofAccountsReceivableConcentrationRiskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_019fd96d-d86b-7dc0-b378-5582c796d662" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_019fd96d-d86b-797e-983f-d18b125fd501" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019fd96d-d86b-7dc0-b378-5582c796d662" xlink:to="loc_us-gaap_ConcentrationRiskTable_019fd96d-d86b-797e-983f-d18b125fd501" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019fd96d-d86b-7263-97d5-1713ec63adc2" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019fd96d-d86b-797e-983f-d18b125fd501" xlink:to="loc_srt_MajorCustomersAxis_019fd96d-d86b-7263-97d5-1713ec63adc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-7263-97d5-1713ec63adc2_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019fd96d-d86b-7263-97d5-1713ec63adc2" xlink:to="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-7263-97d5-1713ec63adc2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-7262-a596-36e4432fafd0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019fd96d-d86b-7263-97d5-1713ec63adc2" xlink:to="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-7262-a596-36e4432fafd0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CustomerAMember_019fd96d-d86b-703d-a2ba-b7be3917c3db" xlink:href="aip-20260930.xsd#aip_CustomerAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-7262-a596-36e4432fafd0" xlink:to="loc_aip_CustomerAMember_019fd96d-d86b-703d-a2ba-b7be3917c3db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CustomerBMember_019fd96d-d86b-7764-9e9f-4329020a75fe" xlink:href="aip-20260930.xsd#aip_CustomerBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-7262-a596-36e4432fafd0" xlink:to="loc_aip_CustomerBMember_019fd96d-d86b-7764-9e9f-4329020a75fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CustomerCMember_019fd96d-d86b-7751-b0a3-c9c980f4cefa" xlink:href="aip-20260930.xsd#aip_CustomerCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-7262-a596-36e4432fafd0" xlink:to="loc_aip_CustomerCMember_019fd96d-d86b-7751-b0a3-c9c980f4cefa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CustomerDMember_019fd96d-d86b-7049-8c7f-d9910f72a24b" xlink:href="aip-20260930.xsd#aip_CustomerDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-7262-a596-36e4432fafd0" xlink:to="loc_aip_CustomerDMember_019fd96d-d86b-7049-8c7f-d9910f72a24b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019fd96d-d86b-715a-9801-71e324fc44c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019fd96d-d86b-797e-983f-d18b125fd501" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019fd96d-d86b-715a-9801-71e324fc44c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019fd96d-d86b-715a-9801-71e324fc44c1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019fd96d-d86b-715a-9801-71e324fc44c1" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019fd96d-d86b-715a-9801-71e324fc44c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019fd96d-d86b-77b6-b28a-4ed42aa5e81d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019fd96d-d86b-715a-9801-71e324fc44c1" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019fd96d-d86b-77b6-b28a-4ed42aa5e81d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_019fd96d-d86b-78dc-95f1-9311aa83f43f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019fd96d-d86b-77b6-b28a-4ed42aa5e81d" xlink:to="loc_us-gaap_AccountsReceivableMember_019fd96d-d86b-78dc-95f1-9311aa83f43f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019fd96d-d86b-72ca-b98c-0d429ac37e38" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019fd96d-d86b-797e-983f-d18b125fd501" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019fd96d-d86b-72ca-b98c-0d429ac37e38" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019fd96d-d86b-72ca-b98c-0d429ac37e38_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019fd96d-d86b-72ca-b98c-0d429ac37e38" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019fd96d-d86b-72ca-b98c-0d429ac37e38_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019fd96d-d86b-71d6-a3b2-3f35845d297b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019fd96d-d86b-72ca-b98c-0d429ac37e38" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019fd96d-d86b-71d6-a3b2-3f35845d297b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019fd96d-d86b-7fc3-9fab-3f346f047b3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019fd96d-d86b-71d6-a3b2-3f35845d297b" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019fd96d-d86b-7fc3-9fab-3f346f047b3c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019fd96d-d86b-729a-87e0-7acd05354ec6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019fd96d-d86b-7dc0-b378-5582c796d662" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019fd96d-d86b-729a-87e0-7acd05354ec6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/BASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofRevenueConcentrationRiskDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#BASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofRevenueConcentrationRiskDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/BASISOFPRESENTATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofRevenueConcentrationRiskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_019fd96d-d86b-7343-8ac1-94bd8c022093" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_019fd96d-d86b-7618-8cd8-71b5d924362e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019fd96d-d86b-7343-8ac1-94bd8c022093" xlink:to="loc_us-gaap_ConcentrationRiskTable_019fd96d-d86b-7618-8cd8-71b5d924362e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019fd96d-d86b-707f-99f6-437b7214b96a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019fd96d-d86b-7618-8cd8-71b5d924362e" xlink:to="loc_srt_MajorCustomersAxis_019fd96d-d86b-707f-99f6-437b7214b96a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-707f-99f6-437b7214b96a_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019fd96d-d86b-707f-99f6-437b7214b96a" xlink:to="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-707f-99f6-437b7214b96a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-7498-ba62-bc1d251fed6d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019fd96d-d86b-707f-99f6-437b7214b96a" xlink:to="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-7498-ba62-bc1d251fed6d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CustomerDMember_01a144b7-1eb2-72fd-904e-7748b1e8d42e" xlink:href="aip-20260930.xsd#aip_CustomerDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019fd96d-d86b-7498-ba62-bc1d251fed6d" xlink:to="loc_aip_CustomerDMember_01a144b7-1eb2-72fd-904e-7748b1e8d42e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019fd96d-d86b-7933-b009-f3e1457aa7ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019fd96d-d86b-7618-8cd8-71b5d924362e" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019fd96d-d86b-7933-b009-f3e1457aa7ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019fd96d-d86b-7933-b009-f3e1457aa7ee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019fd96d-d86b-7933-b009-f3e1457aa7ee" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019fd96d-d86b-7933-b009-f3e1457aa7ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019fd96d-d86b-7297-867c-1f4ce2fdf8e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019fd96d-d86b-7933-b009-f3e1457aa7ee" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019fd96d-d86b-7297-867c-1f4ce2fdf8e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerMember_019fd96d-d86b-7a06-ac45-4d0d28812c5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019fd96d-d86b-7297-867c-1f4ce2fdf8e9" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerMember_019fd96d-d86b-7a06-ac45-4d0d28812c5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019fd96d-d86b-75b3-b1df-52325b22662c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019fd96d-d86b-7618-8cd8-71b5d924362e" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019fd96d-d86b-75b3-b1df-52325b22662c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019fd96d-d86b-75b3-b1df-52325b22662c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019fd96d-d86b-75b3-b1df-52325b22662c" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019fd96d-d86b-75b3-b1df-52325b22662c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019fd96d-d86b-79b8-8a99-e160e778cea6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019fd96d-d86b-75b3-b1df-52325b22662c" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019fd96d-d86b-79b8-8a99-e160e778cea6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019fd96d-d86b-7dac-8db3-2fb0c4dcd6f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019fd96d-d86b-79b8-8a99-e160e778cea6" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019fd96d-d86b-7dac-8db3-2fb0c4dcd6f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019fd96d-d86b-74fe-8b65-61dc1cce1409" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019fd96d-d86b-7343-8ac1-94bd8c022093" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019fd96d-d86b-74fe-8b65-61dc1cce1409" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/REVENUEScheduleofDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#REVENUEScheduleofDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/REVENUEScheduleofDisaggregationofRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7aeb-a277-87277cecb35b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019fd96d-d86b-7a11-8069-495c449e2250" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7aeb-a277-87277cecb35b" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019fd96d-d86b-7a11-8069-495c449e2250" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019fd96d-d86b-7489-83de-464bda00becd" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019fd96d-d86b-7a11-8069-495c449e2250" xlink:to="loc_srt_ProductOrServiceAxis_019fd96d-d86b-7489-83de-464bda00becd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019fd96d-d86b-7489-83de-464bda00becd_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019fd96d-d86b-7489-83de-464bda00becd" xlink:to="loc_srt_ProductsAndServicesDomain_019fd96d-d86b-7489-83de-464bda00becd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019fd96d-d86b-7ce9-bd83-83beb73e6d02" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019fd96d-d86b-7489-83de-464bda00becd" xlink:to="loc_srt_ProductsAndServicesDomain_019fd96d-d86b-7ce9-bd83-83beb73e6d02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LicenseAndMaintenanceMember_019fd96d-d86b-7069-a23a-d9079dd87bc4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LicenseAndMaintenanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019fd96d-d86b-7ce9-bd83-83beb73e6d02" xlink:to="loc_us-gaap_LicenseAndMaintenanceMember_019fd96d-d86b-7069-a23a-d9079dd87bc4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RoyaltyMember_019fd96d-d86b-7b65-b548-50c7ff85b4b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RoyaltyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019fd96d-d86b-7ce9-bd83-83beb73e6d02" xlink:to="loc_us-gaap_RoyaltyMember_019fd96d-d86b-7b65-b548-50c7ff85b4b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_ProfessionalServicesAndOtherMember_019fd96d-d86b-7855-b5a5-00f168911116" xlink:href="aip-20260930.xsd#aip_ProfessionalServicesAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019fd96d-d86b-7ce9-bd83-83beb73e6d02" xlink:to="loc_aip_ProfessionalServicesAndOtherMember_019fd96d-d86b-7855-b5a5-00f168911116" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fd96d-d86b-7601-91a7-0bbe697b3bb0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7aeb-a277-87277cecb35b" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fd96d-d86b-7601-91a7-0bbe697b3bb0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/REVENUENarrativeDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#REVENUENarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/REVENUENarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019fd96d-d86b-7e7f-a827-69f23ec1ba5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019fd96d-d86b-7e7f-a827-69f23ec1ba5c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019fd96d-d86b-70d1-ab4b-f3cf3b173dde" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019fd96d-d86b-7e7f-a827-69f23ec1ba5c" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019fd96d-d86b-70d1-ab4b-f3cf3b173dde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019fd96d-d90f-7bdc-be56-dad68b315ad8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019fd96d-d90f-7bdc-be56-dad68b315ad8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019fd96d-d90f-7bcc-90a1-96c114273f3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019fd96d-d90f-7bcc-90a1-96c114273f3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019fd96d-d90f-7159-aeab-06e3643cce3b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019fd96d-d90f-7159-aeab-06e3643cce3b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_RevenueRemainingPerformanceObligationFlexibleSpendingAccountCommitmentAmount_019fd96d-d90f-7477-8c88-0e2a5547c7bd" xlink:href="aip-20260930.xsd#aip_RevenueRemainingPerformanceObligationFlexibleSpendingAccountCommitmentAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:to="loc_aip_RevenueRemainingPerformanceObligationFlexibleSpendingAccountCommitmentAmount_019fd96d-d90f-7477-8c88-0e2a5547c7bd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAmortization_019fd96d-d90f-7a28-9245-77cd19f38d7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizedContractCostAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:to="loc_us-gaap_CapitalizedContractCostAmortization_019fd96d-d90f-7a28-9245-77cd19f38d7e" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/REVENUENarrativeDetails_1" xlink:type="simple" xlink:href="aip-20260930.xsd#REVENUENarrativeDetails_1"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/REVENUENarrativeDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019fd96d-d86b-7e7f-a827-69f23ec1ba5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019fd96d-d86b-7e7f-a827-69f23ec1ba5c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019fd96d-d90f-7bdc-be56-dad68b315ad8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019fd96d-d90f-7bdc-be56-dad68b315ad8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019fd96d-d90f-7bcc-90a1-96c114273f3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019fd96d-d90f-7bcc-90a1-96c114273f3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019fd96d-d90f-7159-aeab-06e3643cce3b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019fd96d-d90f-7159-aeab-06e3643cce3b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_RevenueRemainingPerformanceObligationFlexibleSpendingAccountCommitmentAmount_019fd96d-d90f-7477-8c88-0e2a5547c7bd" xlink:href="aip-20260930.xsd#aip_RevenueRemainingPerformanceObligationFlexibleSpendingAccountCommitmentAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:to="loc_aip_RevenueRemainingPerformanceObligationFlexibleSpendingAccountCommitmentAmount_019fd96d-d90f-7477-8c88-0e2a5547c7bd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAmortization_019fd96d-d90f-7a28-9245-77cd19f38d7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizedContractCostAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019fd96d-d86b-7504-9f19-d247a7a739b1" xlink:to="loc_us-gaap_CapitalizedContractCostAmortization_019fd96d-d90f-7a28-9245-77cd19f38d7e" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/NETLOSSPERSHAREScheduleofPotentiallyDilutiveSecuritiesExcludedfromtheCalculationofDilutedEarningsPerShareDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#NETLOSSPERSHAREScheduleofPotentiallyDilutiveSecuritiesExcludedfromtheCalculationofDilutedEarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/NETLOSSPERSHAREScheduleofPotentiallyDilutiveSecuritiesExcludedfromtheCalculationofDilutedEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019fd96d-d90f-705f-9d34-f881b637651d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019fd96d-d90f-71c2-8abc-c745c2bb2829" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019fd96d-d90f-705f-9d34-f881b637651d" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019fd96d-d90f-71c2-8abc-c745c2bb2829" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019fd96d-d90f-7ae7-915c-89cc07e5d5c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019fd96d-d90f-71c2-8abc-c745c2bb2829" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019fd96d-d90f-7ae7-915c-89cc07e5d5c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019fd96d-d90f-7ae7-915c-89cc07e5d5c6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019fd96d-d90f-7ae7-915c-89cc07e5d5c6" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019fd96d-d90f-7ae7-915c-89cc07e5d5c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019fd96d-d90f-702f-a728-a4e9bf14c68d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019fd96d-d90f-7ae7-915c-89cc07e5d5c6" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019fd96d-d90f-702f-a728-a4e9bf14c68d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_RestrictedAndPerformanceStockUnitsMember_01a15903-9b28-759c-84c7-51f67a0608da" xlink:href="aip-20260930.xsd#aip_RestrictedAndPerformanceStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019fd96d-d90f-702f-a728-a4e9bf14c68d" xlink:to="loc_aip_RestrictedAndPerformanceStockUnitsMember_01a15903-9b28-759c-84c7-51f67a0608da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019fd96d-d90f-7a79-9fd8-abce557e2c1c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019fd96d-d90f-702f-a728-a4e9bf14c68d" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019fd96d-d90f-7a79-9fd8-abce557e2c1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_019fd96d-d90f-7604-a992-e9150bbf0dd7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019fd96d-d90f-702f-a728-a4e9bf14c68d" xlink:to="loc_us-gaap_EmployeeStockMember_019fd96d-d90f-7604-a992-e9150bbf0dd7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_019fd96d-d90f-71be-aa08-0ed1655fdde4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019fd96d-d90f-702f-a728-a4e9bf14c68d" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_019fd96d-d90f-71be-aa08-0ed1655fdde4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019fd96d-d90f-7c32-bbfb-baffe26bc35b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019fd96d-d90f-705f-9d34-f881b637651d" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019fd96d-d90f-7c32-bbfb-baffe26bc35b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/INVESTMENTSScheduleofFairValueandAmortizedCostDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#INVESTMENTSScheduleofFairValueandAmortizedCostDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/INVESTMENTSScheduleofFairValueandAmortizedCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019fd96d-d90f-71fc-90eb-9d53f65a0090" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_019fd96d-d90f-7e36-8169-9ba5dd8140a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfHeldToMaturitySecuritiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019fd96d-d90f-71fc-90eb-9d53f65a0090" xlink:to="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_019fd96d-d90f-7e36-8169-9ba5dd8140a4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019fd96d-d90f-75a9-93e1-90ebf62b23ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_019fd96d-d90f-7e36-8169-9ba5dd8140a4" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019fd96d-d90f-75a9-93e1-90ebf62b23ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-75a9-93e1-90ebf62b23ef_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019fd96d-d90f-75a9-93e1-90ebf62b23ef" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-75a9-93e1-90ebf62b23ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-78be-aca2-bfed1a59b54a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019fd96d-d90f-75a9-93e1-90ebf62b23ef" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-78be-aca2-bfed1a59b54a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019fd96d-d90f-714f-8b95-af234219ccef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-78be-aca2-bfed1a59b54a" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019fd96d-d90f-714f-8b95-af234219ccef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_019fd96d-d90f-750d-a9d9-c81d06d7ba0f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-78be-aca2-bfed1a59b54a" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_019fd96d-d90f-750d-a9d9-c81d06d7ba0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019fd96d-d90f-7e57-98c1-83c9ff248f92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-78be-aca2-bfed1a59b54a" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019fd96d-d90f-7e57-98c1-83c9ff248f92" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentDebtSecuritiesMember_019fd96d-d90f-7403-b832-4399c3906e41" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-78be-aca2-bfed1a59b54a" xlink:to="loc_us-gaap_USGovernmentDebtSecuritiesMember_019fd96d-d90f-7403-b832-4399c3906e41" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_01a11927-488b-71ac-af78-bd8edc6e6e1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-78be-aca2-bfed1a59b54a" xlink:to="loc_us-gaap_CommercialPaperMember_01a11927-488b-71ac-af78-bd8edc6e6e1a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CashCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCost_019fd96d-d90f-72d2-b5cf-9113c1a66d9c" xlink:href="aip-20260930.xsd#aip_CashCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019fd96d-d90f-71fc-90eb-9d53f65a0090" xlink:to="loc_aip_CashCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCost_019fd96d-d90f-72d2-b5cf-9113c1a66d9c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax_019fd96d-d90f-786f-89f5-06ad0f2e3d3d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019fd96d-d90f-71fc-90eb-9d53f65a0090" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax_019fd96d-d90f-786f-89f5-06ad0f2e3d3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CashCashEquivalentsAndAvailableForSaleDebtSecurities_019fd96d-d90f-72f6-9eed-8c5684276f58" xlink:href="aip-20260930.xsd#aip_CashCashEquivalentsAndAvailableForSaleDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019fd96d-d90f-71fc-90eb-9d53f65a0090" xlink:to="loc_aip_CashCashEquivalentsAndAvailableForSaleDebtSecurities_019fd96d-d90f-72f6-9eed-8c5684276f58" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/FAIRVALUEMEASUREMENTSNarrativeDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#FAIRVALUEMEASUREMENTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/FAIRVALUEMEASUREMENTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_019fd96d-d90f-7f6a-a7c5-8dd08b0a95f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_019fd96d-d90f-70fc-9274-bb864d2a029b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_019fd96d-d90f-7f6a-a7c5-8dd08b0a95f2" xlink:to="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_019fd96d-d90f-70fc-9274-bb864d2a029b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019fd96d-d90f-7e7b-b236-5190c836afa5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_019fd96d-d90f-70fc-9274-bb864d2a029b" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019fd96d-d90f-7e7b-b236-5190c836afa5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019fd96d-d90f-7e7b-b236-5190c836afa5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019fd96d-d90f-7e7b-b236-5190c836afa5" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019fd96d-d90f-7e7b-b236-5190c836afa5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019fd96d-d90f-7d09-bb51-059c8653b715" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019fd96d-d90f-7e7b-b236-5190c836afa5" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019fd96d-d90f-7d09-bb51-059c8653b715" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019fd96d-d90f-7c20-901e-e32f8ffa7cb2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019fd96d-d90f-7d09-bb51-059c8653b715" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019fd96d-d90f-7c20-901e-e32f8ffa7cb2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019fd96d-d90f-7d65-83a3-cc19d93c1be8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019fd96d-d90f-7c20-901e-e32f8ffa7cb2" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019fd96d-d90f-7d65-83a3-cc19d93c1be8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_019fd96d-d90f-7135-af55-e85ebbc6277e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_019fd96d-d90f-70fc-9274-bb864d2a029b" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_019fd96d-d90f-7135-af55-e85ebbc6277e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019fd96d-d90f-7135-af55-e85ebbc6277e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019fd96d-d90f-7135-af55-e85ebbc6277e" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019fd96d-d90f-7135-af55-e85ebbc6277e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019fd96d-d90f-72a5-9b9a-31c72b86d9fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019fd96d-d90f-7135-af55-e85ebbc6277e" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019fd96d-d90f-72a5-9b9a-31c72b86d9fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputPriceVolatilityMember_019fd96d-d90f-723c-8b07-a2a9cd3153d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputPriceVolatilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019fd96d-d90f-72a5-9b9a-31c72b86d9fd" xlink:to="loc_us-gaap_MeasurementInputPriceVolatilityMember_019fd96d-d90f-723c-8b07-a2a9cd3153d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_019fd96d-d90f-79d0-b876-fd98acf492f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019fd96d-d90f-72a5-9b9a-31c72b86d9fd" xlink:to="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_019fd96d-d90f-79d0-b876-fd98acf492f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019fd96d-d90f-703c-bda8-cec837cb2f66" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_019fd96d-d90f-7f6a-a7c5-8dd08b0a95f2" xlink:to="loc_us-gaap_LongTermDebtFairValue_019fd96d-d90f-703c-bda8-cec837cb2f66" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput_019fd96d-d90f-7388-9040-2f9698036311" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_019fd96d-d90f-7f6a-a7c5-8dd08b0a95f2" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput_019fd96d-d90f-7388-9040-2f9698036311" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/FAIRVALUEMEASUREMENTSScheduleofFinancialInstrumentsRecordedatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#FAIRVALUEMEASUREMENTSScheduleofFinancialInstrumentsRecordedatFairValueonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/FAIRVALUEMEASUREMENTSScheduleofFinancialInstrumentsRecordedatFairValueonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_019fd96d-d90f-7ef0-ad38-4c681e41adfd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_019fd96d-d90f-762d-9e6f-ae5467764569" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_019fd96d-d90f-7ef0-ad38-4c681e41adfd" xlink:to="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_019fd96d-d90f-762d-9e6f-ae5467764569" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_019fd96d-d90f-7879-9a05-333f8796dcd1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_019fd96d-d90f-762d-9e6f-ae5467764569" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_019fd96d-d90f-7879-9a05-333f8796dcd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019fd96d-d90f-7879-9a05-333f8796dcd1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019fd96d-d90f-7879-9a05-333f8796dcd1" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019fd96d-d90f-7879-9a05-333f8796dcd1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019fd96d-d90f-7401-b0ea-623ca7447b8c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019fd96d-d90f-7879-9a05-333f8796dcd1" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019fd96d-d90f-7401-b0ea-623ca7447b8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019fd96d-d90f-750c-a739-fa876280d24d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019fd96d-d90f-7401-b0ea-623ca7447b8c" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019fd96d-d90f-750c-a739-fa876280d24d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_01a1192d-d617-7ac7-aaf6-f20fa2e031e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019fd96d-d90f-7401-b0ea-623ca7447b8c" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_01a1192d-d617-7ac7-aaf6-f20fa2e031e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019fd96d-d90f-7736-9091-b6b6fd6c95ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_019fd96d-d90f-762d-9e6f-ae5467764569" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019fd96d-d90f-7736-9091-b6b6fd6c95ca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-7736-9091-b6b6fd6c95ca_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019fd96d-d90f-7736-9091-b6b6fd6c95ca" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-7736-9091-b6b6fd6c95ca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-7c72-b79f-9ebfd3ce7687" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019fd96d-d90f-7736-9091-b6b6fd6c95ca" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-7c72-b79f-9ebfd3ce7687" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_019fd96d-d90f-718d-8c24-01016ef47103" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-7c72-b79f-9ebfd3ce7687" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_019fd96d-d90f-718d-8c24-01016ef47103" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019fd96d-d90f-731a-bb8c-96e00a099bed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-7c72-b79f-9ebfd3ce7687" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019fd96d-d90f-731a-bb8c-96e00a099bed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentDebtSecuritiesMember_019fd96d-d90f-7ca8-b559-1c21c89b97f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-7c72-b79f-9ebfd3ce7687" xlink:to="loc_us-gaap_USGovernmentDebtSecuritiesMember_019fd96d-d90f-7ca8-b559-1c21c89b97f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_01a1192e-0b71-71f8-9987-52bbc0f3dfda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fd96d-d90f-7c72-b79f-9ebfd3ce7687" xlink:to="loc_us-gaap_CommercialPaperMember_01a1192e-0b71-71f8-9987-52bbc0f3dfda" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019fd96d-d90f-7ec8-8544-c4790f511a31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_019fd96d-d90f-762d-9e6f-ae5467764569" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019fd96d-d90f-7ec8-8544-c4790f511a31" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fd96d-d90f-7ec8-8544-c4790f511a31_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019fd96d-d90f-7ec8-8544-c4790f511a31" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fd96d-d90f-7ec8-8544-c4790f511a31_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fd96d-d90f-7ce4-9e36-5627251c34f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019fd96d-d90f-7ec8-8544-c4790f511a31" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fd96d-d90f-7ce4-9e36-5627251c34f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019fd96d-d90f-7086-b8e0-d5fb16b861a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fd96d-d90f-7ce4-9e36-5627251c34f0" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019fd96d-d90f-7086-b8e0-d5fb16b861a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019fd96d-d90f-7d69-9676-9ef081a749c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fd96d-d90f-7ce4-9e36-5627251c34f0" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019fd96d-d90f-7d69-9676-9ef081a749c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019fd96d-d90f-7a6a-a74a-e1feabdd7f66" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fd96d-d90f-7ce4-9e36-5627251c34f0" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019fd96d-d90f-7a6a-a74a-e1feabdd7f66" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_019fd96d-d90f-7ace-b55e-ce29dc1b2f5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_019fd96d-d90f-7ef0-ad38-4c681e41adfd" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_019fd96d-d90f-7ace-b55e-ce29dc1b2f5f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019fd96d-d90f-74ab-baf5-45b6fb058212" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019fd96d-d90f-7ace-b55e-ce29dc1b2f5f" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019fd96d-d90f-74ab-baf5-45b6fb058212" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestCurrent_019fd96d-d90f-7d2e-aa99-94004354fd65" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019fd96d-d90f-7ace-b55e-ce29dc1b2f5f" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestCurrent_019fd96d-d90f-7d2e-aa99-94004354fd65" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestNoncurrent_019fd96d-d90f-7910-ad9f-2e18f505a14d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019fd96d-d90f-7ace-b55e-ce29dc1b2f5f" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestNoncurrent_019fd96d-d90f-7910-ad9f-2e18f505a14d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019fd96d-d90f-75b6-a05b-bb8e4087aa8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019fd96d-d90f-7ace-b55e-ce29dc1b2f5f" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019fd96d-d90f-75b6-a05b-bb8e4087aa8a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019fd96d-d90f-7cad-8d93-2862623d3dde" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_019fd96d-d90f-7ef0-ad38-4c681e41adfd" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019fd96d-d90f-7cad-8d93-2862623d3dde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019fd96d-d90f-731d-8e80-4155603548e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019fd96d-d90f-7cad-8d93-2862623d3dde" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019fd96d-d90f-731d-8e80-4155603548e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_019fd96d-d90f-761b-8540-e2014292d225" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019fd96d-d90f-7cad-8d93-2862623d3dde" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_019fd96d-d90f-761b-8540-e2014292d225" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/FAIRVALUEMEASUREMENTSScheduleofChangesinFairValueofContingentConsiderationLiabilityDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#FAIRVALUEMEASUREMENTSScheduleofChangesinFairValueofContingentConsiderationLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/FAIRVALUEMEASUREMENTSScheduleofChangesinFairValueofContingentConsiderationLiabilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019fd96d-d90f-7ad0-b545-e5cabbedf714" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019fd96d-d90f-7e6f-9705-80e0a4abcc95" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019fd96d-d90f-7ad0-b545-e5cabbedf714" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019fd96d-d90f-7e6f-9705-80e0a4abcc95" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019fd96d-d90f-7365-814c-0998f7c5bd72" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019fd96d-d90f-7e6f-9705-80e0a4abcc95" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019fd96d-d90f-7365-814c-0998f7c5bd72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fd96d-d90f-7365-814c-0998f7c5bd72_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019fd96d-d90f-7365-814c-0998f7c5bd72" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fd96d-d90f-7365-814c-0998f7c5bd72_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fd96d-d90f-7eef-995f-4fd233d223d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019fd96d-d90f-7365-814c-0998f7c5bd72" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fd96d-d90f-7eef-995f-4fd233d223d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019fd96d-d90f-7328-9a48-368abfff09d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fd96d-d90f-7eef-995f-4fd233d223d0" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019fd96d-d90f-7328-9a48-368abfff09d8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019fd96d-d90f-7860-8a41-f88c32e00e81" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019fd96d-d90f-7ad0-b545-e5cabbedf714" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019fd96d-d90f-7860-8a41-f88c32e00e81" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019fd96d-d90f-741f-92b9-ed3ff065c49c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019fd96d-d90f-7860-8a41-f88c32e00e81" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019fd96d-d90f-741f-92b9-ed3ff065c49c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues_01a1a829-fae5-71e7-af14-99b287710541" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019fd96d-d90f-7860-8a41-f88c32e00e81" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues_01a1a829-fae5-71e7-af14-99b287710541" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_019fd96d-d90f-7473-bb42-052ffaed67d7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019fd96d-d90f-7860-8a41-f88c32e00e81" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_019fd96d-d90f-7473-bb42-052ffaed67d7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019fd96d-d90f-7036-9498-d12fe2a31c78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/BUSINESSCOMBINATIONNarrativeDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#BUSINESSCOMBINATIONNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/BUSINESSCOMBINATIONNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7460-9a91-d916438bb279" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-7467-8ded-fe7da7905bda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7460-9a91-d916438bb279" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-7467-8ded-fe7da7905bda" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7b3d-9c62-011451b9e549" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-7467-8ded-fe7da7905bda" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7b3d-9c62-011451b9e549" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7b3d-9c62-011451b9e549_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7b3d-9c62-011451b9e549" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7b3d-9c62-011451b9e549_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7c77-aa69-dc2db16f56fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7b3d-9c62-011451b9e549" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7c77-aa69-dc2db16f56fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CycuityInc.Member_019fd96d-d90f-7ce0-a50e-4d7be1e05dd7" xlink:href="aip-20260930.xsd#aip_CycuityInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7c77-aa69-dc2db16f56fa" xlink:to="loc_aip_CycuityInc.Member_019fd96d-d90f-7ce0-a50e-4d7be1e05dd7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019fd96d-d90f-73a4-8cb4-50d956b38c27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7460-9a91-d916438bb279" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019fd96d-d90f-73a4-8cb4-50d956b38c27" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_019fd96d-d90f-7459-84ef-b95dc28bb541" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7460-9a91-d916438bb279" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_019fd96d-d90f-7459-84ef-b95dc28bb541" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019fd96d-d90f-71a0-9a96-5a8aeb0c37b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7460-9a91-d916438bb279" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019fd96d-d90f-71a0-9a96-5a8aeb0c37b7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019fd96d-d90f-72fc-8905-a6eb99787ddf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7460-9a91-d916438bb279" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019fd96d-d90f-72fc-8905-a6eb99787ddf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_019fd96d-d90f-7ea2-ad65-ebd5404cfb7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7460-9a91-d916438bb279" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_019fd96d-d90f-7ea2-ad65-ebd5404cfb7b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019fd96d-d90f-7ca8-86ba-2e719e8d3833" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7460-9a91-d916438bb279" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019fd96d-d90f-7ca8-86ba-2e719e8d3833" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsExpensesAndLossesRecognized_019fd96d-d90f-7f43-95e6-c5c6aa09cb28" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsExpensesAndLossesRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7460-9a91-d916438bb279" xlink:to="loc_us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsExpensesAndLossesRecognized_019fd96d-d90f-7f43-95e6-c5c6aa09cb28" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_019fd96d-d90f-765e-8627-93d8f77d857b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationIntegrationRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7460-9a91-d916438bb279" xlink:to="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_019fd96d-d90f-765e-8627-93d8f77d857b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019fd96d-d90f-75be-b0fe-684f281ff111" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7460-9a91-d916438bb279" xlink:to="loc_us-gaap_Goodwill_019fd96d-d90f-75be-b0fe-684f281ff111" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_019fd96d-d90f-7bb3-8e7a-c08a863a69d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7460-9a91-d916438bb279" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_019fd96d-d90f-7bb3-8e7a-c08a863a69d8" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/BUSINESSCOMBINATIONScheduleofConsiderationTransferredforAcquisitionDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#BUSINESSCOMBINATIONScheduleofConsiderationTransferredforAcquisitionDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/BUSINESSCOMBINATIONScheduleofConsiderationTransferredforAcquisitionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7861-b34c-8b3abbba1d86" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-77e7-bfa0-f155055beade" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7861-b34c-8b3abbba1d86" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-77e7-bfa0-f155055beade" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7a51-96cd-a3cabaeafab4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-77e7-bfa0-f155055beade" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7a51-96cd-a3cabaeafab4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7a51-96cd-a3cabaeafab4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7a51-96cd-a3cabaeafab4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7a51-96cd-a3cabaeafab4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7a4a-aa8d-0311b71776c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7a51-96cd-a3cabaeafab4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7a4a-aa8d-0311b71776c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CycuityInc.Member_019fd96d-d90f-7e22-a72c-382c5b9898c4" xlink:href="aip-20260930.xsd#aip_CycuityInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7a4a-aa8d-0311b71776c7" xlink:to="loc_aip_CycuityInc.Member_019fd96d-d90f-7e22-a72c-382c5b9898c4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_BusinessCombinationConsiderationTransferredCashPaid_019fd96d-d90f-74e7-8f9b-8e0886b85e06" xlink:href="aip-20260930.xsd#aip_BusinessCombinationConsiderationTransferredCashPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7861-b34c-8b3abbba1d86" xlink:to="loc_aip_BusinessCombinationConsiderationTransferredCashPaid_019fd96d-d90f-74e7-8f9b-8e0886b85e06" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019fd96d-d90f-7048-aa80-e3dd4960b7cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7861-b34c-8b3abbba1d86" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019fd96d-d90f-7048-aa80-e3dd4960b7cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_BusinessCombinationCashPaymentsToSettleVestedAwards_019fd96d-d90f-71cd-8622-7997fc785a2b" xlink:href="aip-20260930.xsd#aip_BusinessCombinationCashPaymentsToSettleVestedAwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7861-b34c-8b3abbba1d86" xlink:to="loc_aip_BusinessCombinationCashPaymentsToSettleVestedAwards_019fd96d-d90f-71cd-8622-7997fc785a2b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019fd96d-d90f-791f-9570-4ccd348933d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7861-b34c-8b3abbba1d86" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019fd96d-d90f-791f-9570-4ccd348933d2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019fd96d-d90f-76c2-aa23-2a91b9a17e95" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-7861-b34c-8b3abbba1d86" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019fd96d-d90f-76c2-aa23-2a91b9a17e95" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/BUSINESSCOMBINATIONScheduleofIdentifiableAssetsAcquiredandLiabilitiesDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#BUSINESSCOMBINATIONScheduleofIdentifiableAssetsAcquiredandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/BUSINESSCOMBINATIONScheduleofIdentifiableAssetsAcquiredandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-7c58-bea5-8a5c64a8f462" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-7c58-bea5-8a5c64a8f462" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7a77-b8b2-4ba1eacd2229" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-7c58-bea5-8a5c64a8f462" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7a77-b8b2-4ba1eacd2229" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7a77-b8b2-4ba1eacd2229_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7a77-b8b2-4ba1eacd2229" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7a77-b8b2-4ba1eacd2229_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7b10-8125-b01d2c55aba5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7a77-b8b2-4ba1eacd2229" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7b10-8125-b01d2c55aba5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CycuityInc.Member_019fd96d-d90f-7448-963d-b08244dbaf7a" xlink:href="aip-20260930.xsd#aip_CycuityInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7b10-8125-b01d2c55aba5" xlink:to="loc_aip_CycuityInc.Member_019fd96d-d90f-7448-963d-b08244dbaf7a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_019fd96d-d90f-731a-a48f-41d4b6d78c82" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_019fd96d-d90f-731a-a48f-41d4b6d78c82" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_019fd96d-d90f-7f38-a190-9fa2ae52c745" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_019fd96d-d90f-7f38-a190-9fa2ae52c745" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_019fd96d-d90f-7129-b498-f506107aee5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_019fd96d-d90f-7129-b498-f506107aee5f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019fd96d-d90f-7949-b28a-1bc22bebbc19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019fd96d-d90f-7949-b28a-1bc22bebbc19" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_BusinessCombinationRecognizedAssetAcquiredIntangibles_019fd96d-d90f-7731-b30a-1acb18786937" xlink:href="aip-20260930.xsd#aip_BusinessCombinationRecognizedAssetAcquiredIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_aip_BusinessCombinationRecognizedAssetAcquiredIntangibles_019fd96d-d90f-7731-b30a-1acb18786937" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_019fd96d-d90f-7b88-95ec-4fa034bb9f7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_019fd96d-d90f-7b88-95ec-4fa034bb9f7c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_019fd96d-d90f-78f8-ad39-11152137f64c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_019fd96d-d90f-78f8-ad39-11152137f64c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue_019fd96d-d90f-7f0b-b4fe-cc19359a7ae7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue_019fd96d-d90f-7f0b-b4fe-cc19359a7ae7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedLiabilitiesAndCurrentLiabilitiesOther_019fd96d-d90f-7287-b9bf-efdc469a7f4f" xlink:href="aip-20260930.xsd#aip_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedLiabilitiesAndCurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_aip_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedLiabilitiesAndCurrentLiabilitiesOther_019fd96d-d90f-7287-b9bf-efdc469a7f4f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_019fd96d-d90f-77c3-b39f-01d3cca7a5ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_019fd96d-d90f-77c3-b39f-01d3cca7a5ea" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_BusinessCombinationRecognizedLiabilityAssumedDeferredRevenueNoncurrent_019fd96d-d90f-7460-8508-bc4baac36028" xlink:href="aip-20260930.xsd#aip_BusinessCombinationRecognizedLiabilityAssumedDeferredRevenueNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_aip_BusinessCombinationRecognizedLiabilityAssumedDeferredRevenueNoncurrent_019fd96d-d90f-7460-8508-bc4baac36028" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019fd96d-d90f-7f0d-9e54-2cb710dccad2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019fd96d-d90f-7f0d-9e54-2cb710dccad2" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019fd96d-d90f-7c1b-a1f3-7d41698719ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019fd96d-d90f-7c1b-a1f3-7d41698719ee" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019fd96d-d90f-7b35-95c3-8b8579f05b65" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_Goodwill_019fd96d-d90f-7b35-95c3-8b8579f05b65" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019fd96d-d90f-7fdb-8e9b-c0cc320eeb89" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-790d-bc93-ec72f9776233" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019fd96d-d90f-7fdb-8e9b-c0cc320eeb89" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/BUSINESSCOMBINATIONScheduleofWeightedaverageUsefulLifeDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#BUSINESSCOMBINATIONScheduleofWeightedaverageUsefulLifeDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/BUSINESSCOMBINATIONScheduleofWeightedaverageUsefulLifeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-76e4-b469-d63ea5449cdf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-7c1e-9768-704a6f041817" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-76e4-b469-d63ea5449cdf" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-7c1e-9768-704a6f041817" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7dbf-ab27-db089cb5cee7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-7c1e-9768-704a6f041817" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7dbf-ab27-db089cb5cee7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7dbf-ab27-db089cb5cee7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7dbf-ab27-db089cb5cee7" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7dbf-ab27-db089cb5cee7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7f99-b658-1e2e72c36253" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019fd96d-d90f-7dbf-ab27-db089cb5cee7" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7f99-b658-1e2e72c36253" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CycuityInc.Member_019fd96d-d90f-76ee-a256-d5e11ce405f9" xlink:href="aip-20260930.xsd#aip_CycuityInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fd96d-d90f-7f99-b658-1e2e72c36253" xlink:to="loc_aip_CycuityInc.Member_019fd96d-d90f-76ee-a256-d5e11ce405f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fd96d-d90f-776c-86d9-1abf7ba396aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fd96d-d90f-7c1e-9768-704a6f041817" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fd96d-d90f-776c-86d9-1abf7ba396aa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-776c-86d9-1abf7ba396aa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fd96d-d90f-776c-86d9-1abf7ba396aa" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-776c-86d9-1abf7ba396aa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-7f6a-88fd-0cc7adb9afeb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fd96d-d90f-776c-86d9-1abf7ba396aa" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-7f6a-88fd-0cc7adb9afeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019fd96d-d90f-738c-82b2-7594b11c866b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-7f6a-88fd-0cc7adb9afeb" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019fd96d-d90f-738c-82b2-7594b11c866b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019fd96d-d90f-773e-ae1d-4eae902e19eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-7f6a-88fd-0cc7adb9afeb" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019fd96d-d90f-773e-ae1d-4eae902e19eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019fd96d-d90f-7313-9dad-643e04832d1d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-7f6a-88fd-0cc7adb9afeb" xlink:to="loc_us-gaap_TradeNamesMember_019fd96d-d90f-7313-9dad-643e04832d1d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_019fd96d-d90f-78f9-b4d0-6e0f7b331033" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-76e4-b469-d63ea5449cdf" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_019fd96d-d90f-78f9-b4d0-6e0f7b331033" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019fd96d-d90f-7094-b7da-3384f4e2c2bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fd96d-d90f-76e4-b469-d63ea5449cdf" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019fd96d-d90f-7094-b7da-3384f4e2c2bd" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/INTANGIBLEASSETSANDGOODWILLScheduleofIntangibleAssetsDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#INTANGIBLEASSETSANDGOODWILLScheduleofIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/INTANGIBLEASSETSANDGOODWILLScheduleofIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019fd96d-d90f-7742-8c31-cd59ae234b9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019fd96d-d90f-75c4-abbc-b8b44d6f5c78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019fd96d-d90f-7742-8c31-cd59ae234b9d" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019fd96d-d90f-75c4-abbc-b8b44d6f5c78" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fd96d-d90f-700e-89eb-e137f93cb883" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019fd96d-d90f-75c4-abbc-b8b44d6f5c78" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fd96d-d90f-700e-89eb-e137f93cb883" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-700e-89eb-e137f93cb883_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fd96d-d90f-700e-89eb-e137f93cb883" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-700e-89eb-e137f93cb883_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-784a-af6a-28411592f597" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fd96d-d90f-700e-89eb-e137f93cb883" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-784a-af6a-28411592f597" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019fd96d-d90f-785e-8f14-54ffc41b0207" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-784a-af6a-28411592f597" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019fd96d-d90f-785e-8f14-54ffc41b0207" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019fd96d-d90f-7cae-ab04-176772cf126a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-784a-af6a-28411592f597" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019fd96d-d90f-7cae-ab04-176772cf126a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019fd96d-d90f-7d55-bef3-2e07d6dae9fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fd96d-d90f-784a-af6a-28411592f597" xlink:to="loc_us-gaap_TradeNamesMember_019fd96d-d90f-7d55-bef3-2e07d6dae9fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_01a14692-b319-774a-bf0d-3f8761db97d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019fd96d-d90f-7742-8c31-cd59ae234b9d" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_01a14692-b319-774a-bf0d-3f8761db97d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetFiniteLivedAndCapitalizedCostSoftwareToBeSoldLeasedOrMarketedAccumulatedAmortization_01a14693-0578-79f1-bca1-a931b86e774c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetFiniteLivedAndCapitalizedCostSoftwareToBeSoldLeasedOrMarketedAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019fd96d-d90f-7742-8c31-cd59ae234b9d" xlink:to="loc_us-gaap_IntangibleAssetFiniteLivedAndCapitalizedCostSoftwareToBeSoldLeasedOrMarketedAccumulatedAmortization_01a14693-0578-79f1-bca1-a931b86e774c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_01a14693-3dad-7ab7-bd91-171a850cb025" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019fd96d-d90f-7742-8c31-cd59ae234b9d" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_01a14693-3dad-7ab7-bd91-171a850cb025" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/BORROWINGSNarrativeDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#BORROWINGSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/BORROWINGSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-74bb-bd39-ced8704857ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019fd96d-d90f-74f3-9da0-ecedb21982f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-74bb-bd39-ced8704857ee" xlink:to="loc_us-gaap_DebtInstrumentTable_019fd96d-d90f-74f3-9da0-ecedb21982f5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019fd96d-d90f-7bb9-8445-57282fe3f6df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019fd96d-d90f-74f3-9da0-ecedb21982f5" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019fd96d-d90f-7bb9-8445-57282fe3f6df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fd96d-d90f-7bb9-8445-57282fe3f6df_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019fd96d-d90f-7bb9-8445-57282fe3f6df" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fd96d-d90f-7bb9-8445-57282fe3f6df_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fd96d-d90f-7dcc-8e16-57596210b3da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019fd96d-d90f-7bb9-8445-57282fe3f6df" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fd96d-d90f-7dcc-8e16-57596210b3da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_VendorFinancingArrangementsMember_019fd96d-d90f-7b77-85a3-ac4c525b64f0" xlink:href="aip-20260930.xsd#aip_VendorFinancingArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019fd96d-d90f-7dcc-8e16-57596210b3da" xlink:to="loc_aip_VendorFinancingArrangementsMember_019fd96d-d90f-7b77-85a3-ac4c525b64f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019fd96d-d90f-768c-aeea-0eff430dbb3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-74bb-bd39-ced8704857ee" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019fd96d-d90f-768c-aeea-0eff430dbb3f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/BORROWINGSScheduleofVendorFinancingArrangementsDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#BORROWINGSScheduleofVendorFinancingArrangementsDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/BORROWINGSScheduleofVendorFinancingArrangementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-7456-ae6d-3348bcf87c58" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019fd96d-d90f-7318-8aed-e08842631ed7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-7456-ae6d-3348bcf87c58" xlink:to="loc_us-gaap_DebtInstrumentTable_019fd96d-d90f-7318-8aed-e08842631ed7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019fd96d-d90f-758b-aa72-7cc7db6867b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019fd96d-d90f-7318-8aed-e08842631ed7" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019fd96d-d90f-758b-aa72-7cc7db6867b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fd96d-d90f-758b-aa72-7cc7db6867b4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019fd96d-d90f-758b-aa72-7cc7db6867b4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fd96d-d90f-758b-aa72-7cc7db6867b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fd96d-d90f-75ba-80b7-1a4e3078b117" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019fd96d-d90f-758b-aa72-7cc7db6867b4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fd96d-d90f-75ba-80b7-1a4e3078b117" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_VendorFinancingArrangementsMember_019fd96d-d90f-7fea-8653-6267bcc45f1b" xlink:href="aip-20260930.xsd#aip_VendorFinancingArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019fd96d-d90f-75ba-80b7-1a4e3078b117" xlink:to="loc_aip_VendorFinancingArrangementsMember_019fd96d-d90f-7fea-8653-6267bcc45f1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_019fd96d-d90f-7fad-a62b-f50cbc12febe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-7456-ae6d-3348bcf87c58" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_019fd96d-d90f-7fad-a62b-f50cbc12febe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_019fd96d-d90f-7606-8903-3f04d054fe67" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-7456-ae6d-3348bcf87c58" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_019fd96d-d90f-7606-8903-3f04d054fe67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_019fd96d-d90f-7f94-bc2c-347ff3900a9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-7456-ae6d-3348bcf87c58" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_019fd96d-d90f-7f94-bc2c-347ff3900a9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_019fd96d-d90f-75a6-b08c-5dfcde09c2b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-7456-ae6d-3348bcf87c58" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_019fd96d-d90f-75a6-b08c-5dfcde09c2b4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019fd96d-d90f-77cb-9d86-1133a8b04a4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-7456-ae6d-3348bcf87c58" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019fd96d-d90f-77cb-9d86-1133a8b04a4d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_LongTermDebtUndiscountedExcessAmount_019fd96d-d90f-79f5-a7fa-73672fb3a65b" xlink:href="aip-20260930.xsd#aip_LongTermDebtUndiscountedExcessAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-7456-ae6d-3348bcf87c58" xlink:to="loc_aip_LongTermDebtUndiscountedExcessAmount_019fd96d-d90f-79f5-a7fa-73672fb3a65b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019fd96d-d90f-77de-9395-57887904211d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-7456-ae6d-3348bcf87c58" xlink:to="loc_us-gaap_LongTermDebt_019fd96d-d90f-77de-9395-57887904211d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019fd96d-d90f-7718-9806-08cd4aefc2ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-7456-ae6d-3348bcf87c58" xlink:to="loc_us-gaap_LongTermDebtCurrent_019fd96d-d90f-7718-9806-08cd4aefc2ac" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019fd96d-d90f-75ca-8f48-f600f4fc1742" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fd96d-d90f-7456-ae6d-3348bcf87c58" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019fd96d-d90f-75ca-8f48-f600f4fc1742" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/COMMITMENTSANDCONTINGENCIESDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#COMMITMENTSANDCONTINGENCIESDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/COMMITMENTSANDCONTINGENCIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_019fd96d-d90f-71b0-8026-745ddbb4833d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_019fd96d-d90f-7624-9929-3de4feed6743" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019fd96d-d90f-71b0-8026-745ddbb4833d" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_019fd96d-d90f-7624-9929-3de4feed6743" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019fd96d-d90f-7ca7-b505-fea8e634dc89" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019fd96d-d90f-7624-9929-3de4feed6743" xlink:to="loc_dei_LegalEntityAxis_019fd96d-d90f-7ca7-b505-fea8e634dc89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019fd96d-d90f-7ca7-b505-fea8e634dc89_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019fd96d-d90f-7ca7-b505-fea8e634dc89" xlink:to="loc_dei_EntityDomain_019fd96d-d90f-7ca7-b505-fea8e634dc89_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019fd96d-d90f-7f51-99c6-072676aae387" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019fd96d-d90f-7ca7-b505-fea8e634dc89" xlink:to="loc_dei_EntityDomain_019fd96d-d90f-7f51-99c6-072676aae387" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CustomerOfCompanyMember_019fd96d-d90f-7f8f-b6a9-9df1209112d1" xlink:href="aip-20260930.xsd#aip_CustomerOfCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019fd96d-d90f-7f51-99c6-072676aae387" xlink:to="loc_aip_CustomerOfCompanyMember_019fd96d-d90f-7f8f-b6a9-9df1209112d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNewClaimsFiledNumber_019fd96d-d90f-76c0-9ee5-30dc7070526b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyNewClaimsFiledNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019fd96d-d90f-71b0-8026-745ddbb4833d" xlink:to="loc_us-gaap_LossContingencyNewClaimsFiledNumber_019fd96d-d90f-76c0-9ee5-30dc7070526b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/COMMONSTOCKANDSTOCKHOLDERSEQUITYDEFICITDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#COMMONSTOCKANDSTOCKHOLDERSEQUITYDEFICITDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/COMMONSTOCKANDSTOCKHOLDERSEQUITYDEFICITDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_019fd96d-d90f-7160-a0a9-8d042fd81204" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_019fd96d-d90f-7ce1-9f09-2e83627b5a9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_019fd96d-d90f-7160-a0a9-8d042fd81204" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_019fd96d-d90f-7ce1-9f09-2e83627b5a9c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019fd96d-d90f-7427-9ff0-f021dac6bc34" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019fd96d-d90f-7ce1-9f09-2e83627b5a9c" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019fd96d-d90f-7427-9ff0-f021dac6bc34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fd96d-d90f-7427-9ff0-f021dac6bc34_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019fd96d-d90f-7427-9ff0-f021dac6bc34" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fd96d-d90f-7427-9ff0-f021dac6bc34_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fd96d-d90f-7637-92da-8c5310e7953b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019fd96d-d90f-7427-9ff0-f021dac6bc34" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fd96d-d90f-7637-92da-8c5310e7953b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IPOMember_019fd96d-d90f-7192-9061-01314fa4c385" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IPOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fd96d-d90f-7637-92da-8c5310e7953b" xlink:to="loc_us-gaap_IPOMember_019fd96d-d90f-7192-9061-01314fa4c385" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019fd96d-d90f-7be5-b043-012010be2612" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019fd96d-d90f-7ce1-9f09-2e83627b5a9c" xlink:to="loc_us-gaap_PlanNameAxis_019fd96d-d90f-7be5-b043-012010be2612" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019fd96d-d90f-7be5-b043-012010be2612_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019fd96d-d90f-7be5-b043-012010be2612" xlink:to="loc_us-gaap_PlanNameDomain_019fd96d-d90f-7be5-b043-012010be2612_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019fd96d-d90f-707f-9160-99134447ee22" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019fd96d-d90f-7be5-b043-012010be2612" xlink:to="loc_us-gaap_PlanNameDomain_019fd96d-d90f-707f-9160-99134447ee22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_ATMOfferingProgramMember_019fd96d-d90f-724f-b5fc-ace73d60e416" xlink:href="aip-20260930.xsd#aip_ATMOfferingProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019fd96d-d90f-707f-9160-99134447ee22" xlink:to="loc_aip_ATMOfferingProgramMember_019fd96d-d90f-724f-b5fc-ace73d60e416" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_NumberOfVotesPerCommonShare_019fd96d-d90f-778b-9d4c-3bb728d23106" xlink:href="aip-20260930.xsd#aip_NumberOfVotesPerCommonShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019fd96d-d90f-7160-a0a9-8d042fd81204" xlink:to="loc_aip_NumberOfVotesPerCommonShare_019fd96d-d90f-778b-9d4c-3bb728d23106" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019fd96d-d90f-7a45-92f4-d9fcd43ade42" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019fd96d-d90f-7160-a0a9-8d042fd81204" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019fd96d-d90f-7a45-92f4-d9fcd43ade42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_019fd96d-d90f-7125-bb6c-f246c489e0cf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019fd96d-d90f-7160-a0a9-8d042fd81204" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_019fd96d-d90f-7125-bb6c-f246c489e0cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_SaleOfStockAuthorizedOfferingAmount_019fd96d-d90f-78ff-bb27-0254eb697d97" xlink:href="aip-20260930.xsd#aip_SaleOfStockAuthorizedOfferingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019fd96d-d90f-7160-a0a9-8d042fd81204" xlink:to="loc_aip_SaleOfStockAuthorizedOfferingAmount_019fd96d-d90f-78ff-bb27-0254eb697d97" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_SaleOfStockAuthorizedGrossProceedsAmount_019fd96d-d90f-7dda-9d50-8741b5762033" xlink:href="aip-20260930.xsd#aip_SaleOfStockAuthorizedGrossProceedsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019fd96d-d90f-7160-a0a9-8d042fd81204" xlink:to="loc_aip_SaleOfStockAuthorizedGrossProceedsAmount_019fd96d-d90f-7dda-9d50-8741b5762033" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019fd96d-d90f-77dc-a9b9-08d3dcccd9e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019fd96d-d90f-7160-a0a9-8d042fd81204" xlink:to="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019fd96d-d90f-77dc-a9b9-08d3dcccd9e3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019fd96d-d90f-77da-b656-195f17bc82f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019fd96d-d90f-7160-a0a9-8d042fd81204" xlink:to="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019fd96d-d90f-77da-b656-195f17bc82f3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_019fd96d-d90f-72fd-9397-07fe62a0fe96" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019fd96d-d90f-7160-a0a9-8d042fd81204" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_019fd96d-d90f-72fd-9397-07fe62a0fe96" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStocksIncludingAdditionalPaidInCapital_019fd96d-d90f-76f9-895f-7460b3ecf14a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStocksIncludingAdditionalPaidInCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019fd96d-d90f-7160-a0a9-8d042fd81204" xlink:to="loc_us-gaap_CommonStocksIncludingAdditionalPaidInCapital_019fd96d-d90f-76f9-895f-7460b3ecf14a" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/STOCKBASEDCOMPENSATIONPLANSANDSTOCKBASEDCOMPENSATIONNarrativeDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#STOCKBASEDCOMPENSATIONPLANSANDSTOCKBASEDCOMPENSATIONNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/STOCKBASEDCOMPENSATIONPLANSANDSTOCKBASEDCOMPENSATIONNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019fd96d-d90f-77c7-868c-e15c870e0ad3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019fd96d-d90f-77c7-868c-e15c870e0ad3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019fd96d-d90f-708e-9a09-a234c2c760f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019fd96d-d90f-77c7-868c-e15c870e0ad3" xlink:to="loc_us-gaap_PlanNameAxis_019fd96d-d90f-708e-9a09-a234c2c760f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019fd96d-d90f-708e-9a09-a234c2c760f6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019fd96d-d90f-708e-9a09-a234c2c760f6" xlink:to="loc_us-gaap_PlanNameDomain_019fd96d-d90f-708e-9a09-a234c2c760f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019fd96d-d90f-7945-b359-597ccf551ae0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019fd96d-d90f-708e-9a09-a234c2c760f6" xlink:to="loc_us-gaap_PlanNameDomain_019fd96d-d90f-7945-b359-597ccf551ae0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_A2022EmploymentInducementIncentivePlanMember_019fd96d-d90f-7425-8ccd-0be33e95b3a1" xlink:href="aip-20260930.xsd#aip_A2022EmploymentInducementIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019fd96d-d90f-7945-b359-597ccf551ae0" xlink:to="loc_aip_A2022EmploymentInducementIncentivePlanMember_019fd96d-d90f-7425-8ccd-0be33e95b3a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_A2021StockPlanMember_019fd96d-d90f-7c0e-9e7d-ad7672036ba2" xlink:href="aip-20260930.xsd#aip_A2021StockPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019fd96d-d90f-7945-b359-597ccf551ae0" xlink:to="loc_aip_A2021StockPlanMember_019fd96d-d90f-7c0e-9e7d-ad7672036ba2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019fd96d-d90f-78a7-9981-fd530d894c5a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019fd96d-d90f-77c7-868c-e15c870e0ad3" xlink:to="loc_us-gaap_AwardTypeAxis_019fd96d-d90f-78a7-9981-fd530d894c5a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-78a7-9981-fd530d894c5a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019fd96d-d90f-78a7-9981-fd530d894c5a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-78a7-9981-fd530d894c5a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-7ff7-87b3-89773a7f6928" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019fd96d-d90f-78a7-9981-fd530d894c5a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-7ff7-87b3-89773a7f6928" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019fd96d-d90f-70b4-ab10-c31aaf10b9ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-7ff7-87b3-89773a7f6928" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019fd96d-d90f-70b4-ab10-c31aaf10b9ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_PerformanceStockUnitsMember_019fd96d-d90f-7070-896d-51586364d386" xlink:href="aip-20260930.xsd#aip_PerformanceStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-7ff7-87b3-89773a7f6928" xlink:to="loc_aip_PerformanceStockUnitsMember_019fd96d-d90f-7070-896d-51586364d386" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_TotalStockholderReturnMember_019fd96d-d90f-76da-b426-403008caeafd" xlink:href="aip-20260930.xsd#aip_TotalStockholderReturnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-7ff7-87b3-89773a7f6928" xlink:to="loc_aip_TotalStockholderReturnMember_019fd96d-d90f-76da-b426-403008caeafd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_019fd96d-d90f-71b3-88df-65a898dea74a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-7ff7-87b3-89773a7f6928" xlink:to="loc_us-gaap_EmployeeStockMember_019fd96d-d90f-71b3-88df-65a898dea74a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_01a18075-e769-73a6-87d1-b0cda061f155" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-7ff7-87b3-89773a7f6928" xlink:to="loc_us-gaap_EmployeeStockOptionMember_01a18075-e769-73a6-87d1-b0cda061f155" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019fd96d-d90f-79dd-9de3-27f814c5d1c8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019fd96d-d90f-77c7-868c-e15c870e0ad3" xlink:to="loc_srt_RangeAxis_019fd96d-d90f-79dd-9de3-27f814c5d1c8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fd96d-d90f-79dd-9de3-27f814c5d1c8_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019fd96d-d90f-79dd-9de3-27f814c5d1c8" xlink:to="loc_srt_RangeMember_019fd96d-d90f-79dd-9de3-27f814c5d1c8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fd96d-d90f-7f6e-8d2f-e13d4adc2fc2" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019fd96d-d90f-79dd-9de3-27f814c5d1c8" xlink:to="loc_srt_RangeMember_019fd96d-d90f-7f6e-8d2f-e13d4adc2fc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019fd96d-d90f-7465-8032-e1f7d6d4d8a5" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019fd96d-d90f-7f6e-8d2f-e13d4adc2fc2" xlink:to="loc_srt_MinimumMember_019fd96d-d90f-7465-8032-e1f7d6d4d8a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019fd96d-d90f-781f-80eb-c65e694bc622" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019fd96d-d90f-7f6e-8d2f-e13d4adc2fc2" xlink:to="loc_srt_MaximumMember_019fd96d-d90f-781f-80eb-c65e694bc622" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019fd96d-d90f-7bad-b89a-a8e841597807" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019fd96d-d90f-7bad-b89a-a8e841597807" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019fd96d-d90f-7136-b29c-c8b799552bd8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019fd96d-d90f-7136-b29c-c8b799552bd8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodVestedGrantDateFairValue_019fd96d-d90f-7448-9969-8e69ce553c45" xlink:href="aip-20260930.xsd#aip_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodVestedGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_aip_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodVestedGrantDateFairValue_019fd96d-d90f-7448-9969-8e69ce553c45" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_019fd96d-d90f-7f9b-b301-73a182b0be19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_019fd96d-d90f-7f9b-b301-73a182b0be19" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019fd96d-d90f-7459-a44c-43f9e01e9f23" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019fd96d-d90f-7459-a44c-43f9e01e9f23" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_019fd96d-d90f-7cba-99c7-be3993ae4d0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_019fd96d-d90f-7cba-99c7-be3993ae4d0d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019fd96d-d90f-7d79-9a48-87cf7b88b6a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019fd96d-d90f-7d79-9a48-87cf7b88b6a8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_01a1a1f4-a911-7b6c-a75c-4d383d976236" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_01a1a1f4-a911-7b6c-a75c-4d383d976236" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_SharedBasedCompensationArrangementByShareBasedPaymentAwardPayoutPercentageCap_019fd96d-d90f-7003-af76-626a80e64484" xlink:href="aip-20260930.xsd#aip_SharedBasedCompensationArrangementByShareBasedPaymentAwardPayoutPercentageCap"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_aip_SharedBasedCompensationArrangementByShareBasedPaymentAwardPayoutPercentageCap_019fd96d-d90f-7003-af76-626a80e64484" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_019fd96d-d90f-7c56-9c09-c7b9b0a91689" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_019fd96d-d90f-7c56-9c09-c7b9b0a91689" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantDateFairValueVested_019fd96d-d90f-7622-a2fd-8ee229df89d2" xlink:href="aip-20260930.xsd#aip_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantDateFairValueVested"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_aip_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantDateFairValueVested_019fd96d-d90f-7622-a2fd-8ee229df89d2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_019fd96d-d90f-7414-b6d9-8d5ffc236f89" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_019fd96d-d90f-7414-b6d9-8d5ffc236f89" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod_019fd96d-d90f-7df5-b6e1-e7535fca2422" xlink:href="aip-20260930.xsd#aip_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_aip_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod_019fd96d-d90f-7df5-b6e1-e7535fca2422" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_019fd96d-d90f-797b-8571-648d880149f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_019fd96d-d90f-797b-8571-648d880149f3" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_019fd96d-d90f-7188-a63e-d8b7b6644a64" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_019fd96d-d90f-7188-a63e-d8b7b6644a64" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_01a144c2-b2f3-7dae-8c55-ac9f0a970084" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-761d-aee1-3042ce8c38ae" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_01a144c2-b2f3-7dae-8c55-ac9f0a970084" xlink:type="arc" order="15"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/STOCKBASEDCOMPENSATIONPLANSANDSTOCKBASEDCOMPENSATIONScheduleofRestrictedandPerformanceStockUnitActivitiesDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#STOCKBASEDCOMPENSATIONPLANSANDSTOCKBASEDCOMPENSATIONScheduleofRestrictedandPerformanceStockUnitActivitiesDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/STOCKBASEDCOMPENSATIONPLANSANDSTOCKBASEDCOMPENSATIONScheduleofRestrictedandPerformanceStockUnitActivitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fd96d-d90f-7887-b352-0cdea2d41642" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019fd96d-d90f-7804-b4bb-8c5ce2315685" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fd96d-d90f-7887-b352-0cdea2d41642" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019fd96d-d90f-7804-b4bb-8c5ce2315685" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019fd96d-d90f-7580-a5fe-276d3518e839" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019fd96d-d90f-7804-b4bb-8c5ce2315685" xlink:to="loc_us-gaap_AwardTypeAxis_019fd96d-d90f-7580-a5fe-276d3518e839" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-7580-a5fe-276d3518e839_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019fd96d-d90f-7580-a5fe-276d3518e839" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-7580-a5fe-276d3518e839_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-71e2-8454-8f108a1f151b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019fd96d-d90f-7580-a5fe-276d3518e839" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-71e2-8454-8f108a1f151b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_RestrictedAndPerformanceStockUnitsMember_019fd96d-d90f-734c-84a1-0a3ad2d151db" xlink:href="aip-20260930.xsd#aip_RestrictedAndPerformanceStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fd96d-d90f-71e2-8454-8f108a1f151b" xlink:to="loc_aip_RestrictedAndPerformanceStockUnitsMember_019fd96d-d90f-734c-84a1-0a3ad2d151db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019fd96d-d90f-78a1-9c67-6f6d773b800a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fd96d-d90f-7887-b352-0cdea2d41642" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019fd96d-d90f-78a1-9c67-6f6d773b800a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019fd96d-d90f-776f-86c1-4515b46b17c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019fd96d-d90f-78a1-9c67-6f6d773b800a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019fd96d-d90f-776f-86c1-4515b46b17c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019fd96d-d90f-7a97-88d9-de407ca23cb2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019fd96d-d90f-78a1-9c67-6f6d773b800a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019fd96d-d90f-7a97-88d9-de407ca23cb2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_01a1590b-7b35-758c-8b9d-b54ad21a28cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019fd96d-d90f-78a1-9c67-6f6d773b800a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_01a1590b-7b35-758c-8b9d-b54ad21a28cc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019fd96d-d90f-71d2-a8ff-66876de79f92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019fd96d-d90f-78a1-9c67-6f6d773b800a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019fd96d-d90f-71d2-a8ff-66876de79f92" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019fd96d-d90f-7337-a859-723ab79f866d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019fd96d-d90f-7642-8e8a-e3729b672ed4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fd96d-d90f-7887-b352-0cdea2d41642" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019fd96d-d90f-7642-8e8a-e3729b672ed4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019fd96d-d90f-7b98-9396-bee34ae55b61" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019fd96d-d90f-7642-8e8a-e3729b672ed4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019fd96d-d90f-7b98-9396-bee34ae55b61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019fd96d-d90f-76f2-a072-dd12306b84ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019fd96d-d90f-7642-8e8a-e3729b672ed4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019fd96d-d90f-76f2-a072-dd12306b84ed" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_01a1590b-87a0-7fdd-bd78-206e14721c2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019fd96d-d90f-7642-8e8a-e3729b672ed4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_01a1590b-87a0-7fdd-bd78-206e14721c2a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019fd96d-d90f-7cb1-8d5d-789610f34221" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019fd96d-d90f-7642-8e8a-e3729b672ed4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019fd96d-d90f-7cb1-8d5d-789610f34221" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019fd96d-d90f-7617-8c30-1b8d7ca67180" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/STOCKBASEDCOMPENSATIONPLANSANDSTOCKBASEDCOMPENSATIONScheduleofStockBasedCompensationRelatedtoStockBasedAwardstoEmployeesDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#STOCKBASEDCOMPENSATIONPLANSANDSTOCKBASEDCOMPENSATIONScheduleofStockBasedCompensationRelatedtoStockBasedAwardstoEmployeesDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/STOCKBASEDCOMPENSATIONPLANSANDSTOCKBASEDCOMPENSATIONScheduleofStockBasedCompensationRelatedtoStockBasedAwardstoEmployeesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-7e9e-b553-b6a22bbf6761" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019fd96d-d90f-7e97-9222-684de858777b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-7e9e-b553-b6a22bbf6761" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019fd96d-d90f-7e97-9222-684de858777b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019fd96d-d90f-7614-92e9-76229709ee32" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfIncomeLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019fd96d-d90f-7e97-9222-684de858777b" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019fd96d-d90f-7614-92e9-76229709ee32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019fd96d-d90f-73fd-aa46-b5ddeedf7529" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-7e9e-b553-b6a22bbf6761" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019fd96d-d90f-73fd-aa46-b5ddeedf7529" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/STOCKBASEDCOMPENSATIONPLANSANDSTOCKBASEDCOMPENSATIONScheduleofStockBasedCompensationRelatedtoStockBasedAwardstoEmployeesDetails_1" xlink:type="simple" xlink:href="aip-20260930.xsd#STOCKBASEDCOMPENSATIONPLANSANDSTOCKBASEDCOMPENSATIONScheduleofStockBasedCompensationRelatedtoStockBasedAwardstoEmployeesDetails_1"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/STOCKBASEDCOMPENSATIONPLANSANDSTOCKBASEDCOMPENSATIONScheduleofStockBasedCompensationRelatedtoStockBasedAwardstoEmployeesDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-7e9e-b553-b6a22bbf6761" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019fd96d-d90f-7e97-9222-684de858777b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-7e9e-b553-b6a22bbf6761" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019fd96d-d90f-7e97-9222-684de858777b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019fd96d-d90f-73fd-aa46-b5ddeedf7529" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019fd96d-d90f-7e9e-b553-b6a22bbf6761" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019fd96d-d90f-73fd-aa46-b5ddeedf7529" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/EQUITYMETHODINVESTMENTDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#EQUITYMETHODINVESTMENTDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/EQUITYMETHODINVESTMENTDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019fd96d-d90f-770d-a30c-02a79f960649" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSubsidiaryOrEquityMethodInvesteeTable_019fd96d-d90f-7ad3-82a7-a03e1718e5b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSubsidiaryOrEquityMethodInvesteeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019fd96d-d90f-770d-a30c-02a79f960649" xlink:to="loc_us-gaap_ScheduleOfSubsidiaryOrEquityMethodInvesteeTable_019fd96d-d90f-7ad3-82a7-a03e1718e5b1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019fd96d-d90f-7373-8867-20c5d2aaf743" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSubsidiaryOrEquityMethodInvesteeTable_019fd96d-d90f-7ad3-82a7-a03e1718e5b1" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019fd96d-d90f-7373-8867-20c5d2aaf743" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019fd96d-d90f-7373-8867-20c5d2aaf743_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019fd96d-d90f-7373-8867-20c5d2aaf743" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019fd96d-d90f-7373-8867-20c5d2aaf743_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019fd96d-d90f-77dd-ba0f-9757db0b389a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019fd96d-d90f-7373-8867-20c5d2aaf743" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019fd96d-d90f-77dd-ba0f-9757db0b389a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_TransChipTechnologyMember_019fd96d-d90f-753c-95c4-4f2548734a2d" xlink:href="aip-20260930.xsd#aip_TransChipTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019fd96d-d90f-77dd-ba0f-9757db0b389a" xlink:to="loc_aip_TransChipTechnologyMember_019fd96d-d90f-753c-95c4-4f2548734a2d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019fd96d-d90f-7220-9670-f18420c1ac3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019fd96d-d90f-770d-a30c-02a79f960649" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019fd96d-d90f-7220-9670-f18420c1ac3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionConvertedInstrumentAmount1_019fd96d-d90f-7d37-9a4d-c21ed3784b54" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtConversionConvertedInstrumentAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019fd96d-d90f-770d-a30c-02a79f960649" xlink:to="loc_us-gaap_DebtConversionConvertedInstrumentAmount1_019fd96d-d90f-7d37-9a4d-c21ed3784b54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_EquityMethodInvestmentOwnershipPercentageOnIssuedAndOutstandingShares_019fd96d-d90f-74b6-8eda-c8dfc83b5c72" xlink:href="aip-20260930.xsd#aip_EquityMethodInvestmentOwnershipPercentageOnIssuedAndOutstandingShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019fd96d-d90f-770d-a30c-02a79f960649" xlink:to="loc_aip_EquityMethodInvestmentOwnershipPercentageOnIssuedAndOutstandingShares_019fd96d-d90f-74b6-8eda-c8dfc83b5c72" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019fd96d-d90f-73f6-8acb-5a2cb064553a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019fd96d-d90f-770d-a30c-02a79f960649" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019fd96d-d90f-73f6-8acb-5a2cb064553a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_01a1a1f3-a089-7e5f-b5c7-254979ad8f7f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019fd96d-d90f-770d-a30c-02a79f960649" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_01a1a1f3-a089-7e5f-b5c7-254979ad8f7f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019fd96d-d90f-7792-8900-9b42f0200bc1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019fd96d-d90f-770d-a30c-02a79f960649" xlink:to="loc_us-gaap_EquityMethodInvestments_019fd96d-d90f-7792-8900-9b42f0200bc1" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.arteris.com/role/RELATEDPARTYTRANSACTIONSDetails" xlink:type="simple" xlink:href="aip-20260930.xsd#RELATEDPARTYTRANSACTIONSDetails"/>
  <link:definitionLink xlink:role="http://www.arteris.com/role/RELATEDPARTYTRANSACTIONSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019fd96d-d90f-7ec4-b39a-20d9fa79634c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019fd96d-d90f-7dc6-849a-e52390d2df09" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019fd96d-d90f-7ec4-b39a-20d9fa79634c" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019fd96d-d90f-7dc6-849a-e52390d2df09" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019fd96d-d90f-7763-bb2e-62cb30c1e40c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019fd96d-d90f-7dc6-849a-e52390d2df09" xlink:to="loc_srt_CounterpartyNameAxis_019fd96d-d90f-7763-bb2e-62cb30c1e40c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019fd96d-d90f-7763-bb2e-62cb30c1e40c_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019fd96d-d90f-7763-bb2e-62cb30c1e40c" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019fd96d-d90f-7763-bb2e-62cb30c1e40c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019fd96d-d90f-7901-8350-504b8034b1b3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019fd96d-d90f-7763-bb2e-62cb30c1e40c" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019fd96d-d90f-7901-8350-504b8034b1b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_TransChipTechnologyMember_019fd96d-d90f-7c35-bb07-33246caa9aff" xlink:href="aip-20260930.xsd#aip_TransChipTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019fd96d-d90f-7901-8350-504b8034b1b3" xlink:to="loc_aip_TransChipTechnologyMember_019fd96d-d90f-7c35-bb07-33246caa9aff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_K.CharlesJanacMember_019fd96d-d90f-7b4e-a919-2a28ee81ce18" xlink:href="aip-20260930.xsd#aip_K.CharlesJanacMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019fd96d-d90f-7901-8350-504b8034b1b3" xlink:to="loc_aip_K.CharlesJanacMember_019fd96d-d90f-7b4e-a919-2a28ee81ce18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_019fd96d-d90f-7064-ab20-5441a31a1d74" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019fd96d-d90f-7dc6-849a-e52390d2df09" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_019fd96d-d90f-7064-ab20-5441a31a1d74" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019fd96d-d90f-7064-ab20-5441a31a1d74_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019fd96d-d90f-7064-ab20-5441a31a1d74" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019fd96d-d90f-7064-ab20-5441a31a1d74_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019fd96d-d90f-7037-93c7-ce8120fcf337" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019fd96d-d90f-7064-ab20-5441a31a1d74" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019fd96d-d90f-7037-93c7-ce8120fcf337" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_CollaborationAgreementMember_019fd96d-d90f-7953-9ea9-a020bc00f65e" xlink:href="aip-20260930.xsd#aip_CollaborationAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019fd96d-d90f-7037-93c7-ce8120fcf337" xlink:to="loc_aip_CollaborationAgreementMember_019fd96d-d90f-7953-9ea9-a020bc00f65e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_ConsultingAgreementMember_019fd96d-d90f-7269-9c0e-7e9a6e7d51a2" xlink:href="aip-20260930.xsd#aip_ConsultingAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019fd96d-d90f-7037-93c7-ce8120fcf337" xlink:to="loc_aip_ConsultingAgreementMember_019fd96d-d90f-7269-9c0e-7e9a6e7d51a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019fd96d-d90f-7270-a994-ec36ccd20c0e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019fd96d-d90f-7dc6-849a-e52390d2df09" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019fd96d-d90f-7270-a994-ec36ccd20c0e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019fd96d-d90f-7270-a994-ec36ccd20c0e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019fd96d-d90f-7270-a994-ec36ccd20c0e" xlink:to="loc_us-gaap_RelatedPartyDomain_019fd96d-d90f-7270-a994-ec36ccd20c0e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019fd96d-d90f-773e-98ea-ae908dc0862e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019fd96d-d90f-7270-a994-ec36ccd20c0e" xlink:to="loc_us-gaap_RelatedPartyDomain_019fd96d-d90f-773e-98ea-ae908dc0862e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_DirectorMember_019fd96d-d90f-768a-a769-c0b7b864a333" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_DirectorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019fd96d-d90f-773e-98ea-ae908dc0862e" xlink:to="loc_srt_DirectorMember_019fd96d-d90f-768a-a769-c0b7b864a333" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_RelatedPartyTransactionAgreementTerm_019fd96d-d90f-75c8-b903-bea3f2ae8261" xlink:href="aip-20260930.xsd#aip_RelatedPartyTransactionAgreementTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019fd96d-d90f-7ec4-b39a-20d9fa79634c" xlink:to="loc_aip_RelatedPartyTransactionAgreementTerm_019fd96d-d90f-75c8-b903-bea3f2ae8261" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019fd96d-d90f-7ed0-a1a1-4495d0ff60fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019fd96d-d90f-7ec4-b39a-20d9fa79634c" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019fd96d-d90f-7ed0-a1a1-4495d0ff60fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fd96d-d90f-7dcc-aa5f-bf46ddb34359" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019fd96d-d90f-7ec4-b39a-20d9fa79634c" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fd96d-d90f-7dcc-aa5f-bf46ddb34359" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019fd96d-d90f-7ca4-9a1e-901cf2928930" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019fd96d-d90f-7ec4-b39a-20d9fa79634c" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019fd96d-d90f-7ca4-9a1e-901cf2928930" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aip_OutstandingEquityPercentage_019fd96d-d90f-71d3-8438-7374a57a1b00" xlink:href="aip-20260930.xsd#aip_OutstandingEquityPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019fd96d-d90f-7ec4-b39a-20d9fa79634c" xlink:to="loc_aip_OutstandingEquityPercentage_019fd96d-d90f-71d3-8438-7374a57a1b00" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfessionalFees_019fd96d-d90f-71d4-8f53-41fa46dd6063" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfessionalFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019fd96d-d90f-7ec4-b39a-20d9fa79634c" xlink:to="loc_us-gaap_ProfessionalFees_019fd96d-d90f-71d4-8f53-41fa46dd6063" xlink:type="arc" order="5"/>
  </link:definitionLink>
</link:linkbase>
