<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<link:linkbase xmlns:ns6="http://www.sec.gov/edgar/sccommon" xmlns:ns5="http://xbrl.org/2006/xbrldi" xmlns:ns8="http://www.sec.gov/edgar/coregsc" xmlns:ns7="http://www.sec.gov/edgar/singlefilersc" xmlns:ns9="http://www.sec.gov/edgar/common" xmlns:ns11="http://www.sec.gov/edgar/feecommon" xmlns:ns10="http://www.sec.gov/edgar/bulkfiling" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:ns4="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ns3="http://www.xbrl.org/2003/XLink">
    <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/SeriesOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#SeriesOnly"/>
    <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ClassOnly"/>
    <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#RiskOnly"/>
    <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#PerformanceMeasureOnly"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DocumentInformation" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DocumentInformation"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000033639_FidelityRealEstateIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_RiskSummaryS000033639_FidelityRealEstateIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000033639_FidelityRealEstateIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DisclosureDetailS000033639_FidelityRealEstateIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000051993_FidelitySAIRealEstateIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_RiskSummaryS000051993_FidelitySAIRealEstateIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000051993_FidelitySAIRealEstateIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DisclosureDetailS000051993_FidelitySAIRealEstateIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000050321_FidelitySAISmall-MidCapMomentumIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_RiskSummaryS000050321_FidelitySAISmall-MidCapMomentumIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000050321_FidelitySAISmall-MidCapMomentumIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DisclosureDetailS000050321_FidelitySAISmall-MidCapMomentumIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000051994_FidelitySAIUSLargeCapIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_RiskSummaryS000051994_FidelitySAIUSLargeCapIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000051994_FidelitySAIUSLargeCapIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DisclosureDetailS000051994_FidelitySAIUSLargeCapIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000056275_FidelitySAIUSMomentumIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_RiskSummaryS000056275_FidelitySAIUSMomentumIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000056275_FidelitySAIUSMomentumIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DisclosureDetailS000056275_FidelitySAIUSMomentumIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000051137_FidelitySAIUSQualityIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_RiskSummaryS000051137_FidelitySAIUSQualityIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000051137_FidelitySAIUSQualityIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DisclosureDetailS000051137_FidelitySAIUSQualityIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000059763_FidelitySAIUSValueIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_RiskSummaryS000059763_FidelitySAIUSValueIndexFund-PRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000059763_FidelitySAIUSValueIndexFund-PRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DisclosureDetailS000059763_FidelitySAIUSValueIndexFund-PRO"/>
    <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-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/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/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
    <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:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/SeriesOnly" xlink:title="050020 - Document - Series">
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_S000050321Member" xlink:label="fmr_S000050321Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000050321Member" order="10.1"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_S000051993Member" xlink:label="fmr_S000051993Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000051993Member" order="10.2"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_S000033639Member" xlink:label="fmr_S000033639Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000033639Member" order="10.3"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_S000059763Member" xlink:label="fmr_S000059763Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000059763Member" order="10.4"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_S000051137Member" xlink:label="fmr_S000051137Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000051137Member" order="10.5"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_S000056275Member" xlink:label="fmr_S000056275Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000056275Member" order="10.6"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_S000051994Member" xlink:label="fmr_S000051994Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000051994Member" order="10.7"/>
    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:title="050030 - Document - Class">
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000158877Member" xlink:label="fmr_C000158877Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000163539Member" xlink:label="fmr_C000163539Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000103377Member" xlink:label="fmr_C000103377Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000195574Member" xlink:label="fmr_C000195574Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000161034Member" xlink:label="fmr_C000161034Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000177148Member" xlink:label="fmr_C000177148Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000163540Member" xlink:label="fmr_C000163540Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000158877Member" order="2"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000163539Member" order="3"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000103377Member" order="4"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000195574Member" order="5"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000161034Member" order="6"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000177148Member" order="7"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000163540Member" order="8"/>
    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:title="050010 - Document - Risk">
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_RealEstateIndustryConcentrationMember" xlink:label="RealEstateIndustryConcentrationMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="RealEstateIndustryConcentrationMember" order="500"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_GrowthInvestingMember" xlink:label="GrowthInvestingMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="GrowthInvestingMember" order="500.1"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IssuerSpecificChangesMember" xlink:label="IssuerSpecificChangesMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="IssuerSpecificChangesMember" order="500.2"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_StockMarketVolatilityMember" xlink:label="StockMarketVolatilityMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="StockMarketVolatilityMember" order="500.3"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_SmallAndMidCapInvestingMember" xlink:label="SmallAndMidCapInvestingMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="SmallAndMidCapInvestingMember" order="500.4"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_CorrelationToIndexMember" xlink:label="CorrelationToIndexMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="CorrelationToIndexMember" order="500.5"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_QualityStocksMember" xlink:label="QualityStocksMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="QualityStocksMember" order="500.6"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_HighPortfolioTurnoverMember" xlink:label="HighPortfolioTurnoverMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="HighPortfolioTurnoverMember" order="500.7"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_SecuritiesLendingRiskMember" xlink:label="SecuritiesLendingRiskMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="SecuritiesLendingRiskMember" order="500.8"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_ValueInvestingMember" xlink:label="ValueInvestingMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="ValueInvestingMember" order="500.9"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_PassiveManagementRiskMember" xlink:label="PassiveManagementRiskMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="PassiveManagementRiskMember" order="501.0"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_RulesBasedStrategyRiskMember" xlink:label="RulesBasedStrategyRiskMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="RulesBasedStrategyRiskMember" order="501.1"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_MomentumSecuritiesRiskMember" xlink:label="MomentumSecuritiesRiskMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="MomentumSecuritiesRiskMember" order="501.2"/>
    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly" xlink:title="050040 - Document - Performance Measure">
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember"/>
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexIXRAQMember" xlink:label="fmr_IndexIXRAQMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexIXR15Member" xlink:label="fmr_IndexIXR15Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexIX280Member" xlink:label="fmr_IndexIX280Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexRS003Member" xlink:label="fmr_IndexRS003Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexIXWLEMember" xlink:label="fmr_IndexIXWLEMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexIXWEXMember" xlink:label="fmr_IndexIXWEXMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexSP001Member" xlink:label="fmr_IndexSP001Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexIXYEFMember" xlink:label="fmr_IndexIXYEFMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexIXYXMMember" xlink:label="fmr_IndexIXYXMMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexIXYOZMember" xlink:label="fmr_IndexIXYOZMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexIXRW2Member" xlink:label="fmr_IndexIXRW2Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexIXRTWMember" xlink:label="fmr_IndexIXRTWMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexIXZE4Member" xlink:label="fmr_IndexIXZE4Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexMS023Member" xlink:label="fmr_IndexMS023Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRAQMember" order="5"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXR15Member" order="6"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIX280Member" order="7"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexRS003Member" order="8"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXWLEMember" order="9"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXWEXMember" order="10"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexSP001Member" order="11"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXYEFMember" order="12"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXYXMMember" order="13"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXYOZMember" order="14"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRW2Member" order="15"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRTWMember" order="16"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXZE4Member" order="17"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexMS023Member" order="18"/>
    </link:definitionLink>
</link:linkbase>
