1two people or things of the same sort considered together:a couple of girls were playing marbles
a pair of partners in a dance or game.
(plural couple) a pair of hunting dogs.
(couples) two collars joined together and used for holding hounds together.
a pair of rafters.
Mechanics a pair of equal and parallel forces acting in opposite directions, and tending to cause rotation about an axis perpendicular to the plane containing them.
2 [treated as singular or plural] two people who are married or otherwise closely associated romantically or sexually:in three weeks the couple fell in love and became engageda honeymoon couple
3 informal an indefinite small number: [as pronoun]:he hoped she’d be better in a couple of dayswe got some eggs—would you like a couple? [as determiner]:just a couple more questionsNorth Americanclean the stains with a couple squirts dishwashing liquid
1 [with object] link or combine (something) with something else:a sense of hope is coupled with a palpable sense of loss
connect (a railway vehicle or a piece of equipment) to another:a cable is coupled up to one of the wheels
connect (two electrical components) using electromagnetic induction, electrostatic charge, or an optical link: (as adjective coupled)networks of coupled oscillators
[no object] (couple up) join to form a pair:the beetles may couple up to form a pair
2 [no object] mate or have sexual intercourse:as middle-class youth grew more tolerant of sex, they started to couple more often
Middle English: from Old French cople (noun), copler (verb), from Latin copula (noun), copulare (verb), from co- 'together' + apere 'fasten'. Compare with copula and copulate