/ ˈkʌplət; NAmE / noun
two lines of poetry of equal length one after the other :
a poem written in rhyming couplets
—see also heroic couplet
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WORD ORIGIN
late 16th cent.: from French , diminutive of couple , from Old French cople (noun), copler (verb), from Latin copula (noun), copulare (verb), from co- together + apere fasten.