<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<link:linkbase xmlns:ns6="http://www.sec.gov/edgar/common" xmlns:ns5="http://www.sec.gov/edgar/singlefilersc" xmlns:ns8="http://www.sec.gov/edgar/coregsc" xmlns:ns7="http://www.sec.gov/edgar/sccommon" xmlns:ns9="http://www.sec.gov/edgar/bulkfiling" xmlns:ns11="http://xbrl.org/2006/xbrldi" xmlns:ns10="http://www.sec.gov/edgar/feecommon" 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/RiskSummaryS000005321_FidelityAdvisorFocusFunds-AMCIZComboPRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_RiskSummaryS000005321_FidelityAdvisorFocusFunds-AMCIZComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000005321_FidelityAdvisorFocusFunds-AMCIZComboPRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DisclosureDetailS000005321_FidelityAdvisorFocusFunds-AMCIZComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000005329_FidelityAdvisorFocusFunds-AMCIZComboPRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_RiskSummaryS000005329_FidelityAdvisorFocusFunds-AMCIZComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000005329_FidelityAdvisorFocusFunds-AMCIZComboPRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DisclosureDetailS000005329_FidelityAdvisorFocusFunds-AMCIZComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000005325_FidelityAdvisorFocusFunds-AMCIZComboPRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_RiskSummaryS000005325_FidelityAdvisorFocusFunds-AMCIZComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000005325_FidelityAdvisorFocusFunds-AMCIZComboPRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DisclosureDetailS000005325_FidelityAdvisorFocusFunds-AMCIZComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000005325_FidelityAdvisorIndustrialsFund-RetailPRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_RiskSummaryS000005325_FidelityAdvisorIndustrialsFund-RetailPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000005325_FidelityAdvisorIndustrialsFund-RetailPRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DisclosureDetailS000005325_FidelityAdvisorIndustrialsFund-RetailPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000005327_FidelityAdvisorFocusFunds-AMCIZComboPRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_RiskSummaryS000005327_FidelityAdvisorFocusFunds-AMCIZComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000005327_FidelityAdvisorFocusFunds-AMCIZComboPRO" xlink:type="simple" xlink:href="fmr-20260929.xsd#role_DisclosureDetailS000005327_FidelityAdvisorFocusFunds-AMCIZComboPRO"/>
    <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_S000005325Member" xlink:label="fmr_S000005325Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000005325Member" order="10.1"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_S000005321Member" xlink:label="fmr_S000005321Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000005321Member" order="10.2"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_S000005329Member" xlink:label="fmr_S000005329Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000005329Member" order="10.3"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_S000005327Member" xlink:label="fmr_S000005327Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000005327Member" order="10.4"/>
    </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_C000264535Member" xlink:label="fmr_C000264535Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014543Member" xlink:label="fmr_C000014543Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014519Member" xlink:label="fmr_C000014519Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014522Member" xlink:label="fmr_C000014522Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014521Member" xlink:label="fmr_C000014521Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014523Member" xlink:label="fmr_C000014523Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000204999Member" xlink:label="fmr_C000204999Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014559Member" xlink:label="fmr_C000014559Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014562Member" xlink:label="fmr_C000014562Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014561Member" xlink:label="fmr_C000014561Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014563Member" xlink:label="fmr_C000014563Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000205006Member" xlink:label="fmr_C000205006Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014539Member" xlink:label="fmr_C000014539Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014542Member" xlink:label="fmr_C000014542Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014541Member" xlink:label="fmr_C000014541Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000205003Member" xlink:label="fmr_C000205003Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014549Member" xlink:label="fmr_C000014549Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014552Member" xlink:label="fmr_C000014552Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014551Member" xlink:label="fmr_C000014551Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000014553Member" xlink:label="fmr_C000014553Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_C000205004Member" xlink:label="fmr_C000205004Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000264535Member" order="2"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014543Member" order="3"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014519Member" order="4"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014522Member" order="5"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014521Member" order="6"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014523Member" order="7"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000204999Member" order="8"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014559Member" order="9"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014562Member" order="10"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014561Member" order="11"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014563Member" order="12"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000205006Member" order="13"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014539Member" order="14"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014542Member" order="15"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014541Member" order="16"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000205003Member" order="17"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014549Member" order="18"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014552Member" order="19"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014551Member" order="20"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000014553Member" order="21"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000205004Member" order="22"/>
    </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_BiotechnologyIndustryConcentrationMember" xlink:label="BiotechnologyIndustryConcentrationMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="BiotechnologyIndustryConcentrationMember" order="500"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_HealthCareIndustryConcentrationMember" xlink:label="HealthCareIndustryConcentrationMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="HealthCareIndustryConcentrationMember" order="500.1"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_ElectronicsIndustryConcentrationMember" xlink:label="ElectronicsIndustryConcentrationMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="ElectronicsIndustryConcentrationMember" order="500.2"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_ForeignExposureMember" xlink:label="ForeignExposureMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="ForeignExposureMember" order="500.3"/>
        <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="500.4"/>
        <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="500.5"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndustrialsIndustryConcentrationMember" xlink:label="IndustrialsIndustryConcentrationMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="IndustrialsIndustryConcentrationMember" order="500.6"/>
    </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_IndexF1511Member" xlink:label="fmr_IndexF1511Member"/>
        <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_IndexF1501Member" xlink:label="fmr_IndexF1501Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexF1513Member" xlink:label="fmr_IndexF1513Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20260929.xsd#fmr_IndexF1508Member" xlink:label="fmr_IndexF1508Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexF1511Member" order="5"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexSP001Member" order="6"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexF1501Member" order="7"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexF1513Member" order="8"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexF1508Member" order="9"/>
    </link:definitionLink>
</link:linkbase>
