noun
a person of roughly the same age as another
adjective
of the same age or date of origin; contemporary
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The two artists were considered coevals in the art world, both achieving success at the same time.
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My coeval friend and I have known each other since we were kids.
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Those two are like, totally coevals, always hanging out together.
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The concept of time being coeval with space is a complex idea in philosophy.