alternate

US /ˈɑːl.tɚ.neɪt/
UK /ˈɑːl.tɚ.neɪt/
"alternate" picture
1.

occur by turns repeatedly

:
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The sun and clouds alternate throughout the day.
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He and his brother alternate driving on long trips.
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rotateinterchangetake turns
2.

change between two or more states or actions

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The traffic lights alternate between red and green.
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Her mood can alternate rapidly between joy and sadness.
:
fluctuateoscillatevary
1.

every other; every second

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We meet on alternate Tuesdays.
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The pattern uses alternate stripes of red and blue.
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every otherevery secondintermittent
2.

denoting a different possible course of action or choice

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Do you have an alternate plan?
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We need to find an alternate route.
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alternativesubstitutedifferent
1.

a person who acts as a substitute for another

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The coach named an alternate for the injured player.
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She served as an alternate juror.
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substitutereplacementreserve
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alternativealternativelyalternative energy alternative medicinealternating currentalternate history