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xlink:from="ShareholderFeesAbstract"
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
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xlink:to="ETFConversionFee"/>
<link:definitionArc
xlink:from="ShareholderFeesAbstract"
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
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xlink:to="TransactionFeeOnPurchases"/>
<link:definitionArc
xlink:to="TransactionFeeOnReinvestedDividends"
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xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:type="arc"
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<link:definitionArc
xlink:from="ShareholderFeesAbstract"
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
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xlink:to="PurchaseFeeParenthetical"/>
<link:definitionArc
xlink:to="RedemptionFeeParenthetical"
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xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:type="arc"
xlink:from="ShareholderFeesAbstract"/></link:definitionLink>
<link:definitionLink
xlink:role="http://vanguard/role/Supplement"
xlink:type="extended">
<link:loc
xlink:type="locator"
xlink:href="chester-20130128.xsd#vanguard_SupplementTextBlock"
xlink:label="SupplementTextBlock"/>
<link:loc
xlink:label="LegalEntityAxis"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/non-gaap/dei-2009-01-31.xsd#dei_LegalEntityAxis"
xlink:type="locator"/>
<link:loc
xlink:label="DocumentInformationDocumentAxis"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/non-gaap/dei-2009-01-31.xsd#dei_DocumentInformationDocumentAxis"
xlink:type="locator"/>
<link:loc
xlink:type="locator"
xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#rr_ProspectusTable"
xlink:label="ProspectusTable"/>
<link:loc
xlink:label="SupplementAbstract"
xlink:href="chester-20130128.xsd#vanguard_SupplementAbstract"
xlink:type="locator"/>
<link:definitionArc
xbrldt:closed="true"
xlink:from="SupplementAbstract"
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/all"
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xlink:to="ProspectusTable"
xbrldt:contextElement="segment"/>
<link:definitionArc
xbrldt:targetRole="http://xbrl.sec.gov/rr/role/Prospectus"
xlink:from="ProspectusTable"
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension"
order="2.0"
xlink:to="DocumentInformationDocumentAxis"/>
<link:definitionArc
xbrldt:targetRole="http://xbrl.sec.gov/rr/role/Series"
xlink:to="LegalEntityAxis"
order="3.0"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension"
xlink:type="arc"
xlink:from="ProspectusTable"/>
<link:definitionArc
xlink:from="SupplementAbstract"
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
order="4.0"
xlink:to="SupplementTextBlock"/></link:definitionLink>
<link:definitionLink
xlink:type="extended"
xlink:role="http://xbrl.sec.gov/rr/role/RiskReturnDetailData">
<link:loc
xlink:label="RiskReturnAbstract"
xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#rr_RiskReturnAbstract"
xlink:type="locator"/></link:definitionLink>
<link:definitionLink
xlink:type="extended"
xlink:role="http://xbrl.sec.gov/rr/role/OperatingExpensesData">
<link:loc
xlink:label="OperatingExpensesAbstract"
xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#rr_OperatingExpensesAbstract"
xlink:type="locator"/>
<link:loc
xlink:label="AquiredFundFeesExpensesExcludingAFFE"
xlink:href="chester-20130128.xsd#vanguard_AquiredFundFeesExpensesExcludingAFFE"
xlink:type="locator"/>
<link:definitionArc
xlink:to="AquiredFundFeesExpensesExcludingAFFE"
order="301.0"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:type="arc"
xlink:from="OperatingExpensesAbstract"/></link:definitionLink></link:linkbase>