Definitioncouple, to engage in sexual interaction or genital union usually by the insertion of the penis into the vagina. See copulation for synonyms.
Etymology: From the Latin copulâre , copulât- , to join together, and from copula , link.
(1) The OED attributes this quote to William Caxton (1483): ' Made one flesshe by carnal copulacyon.'
(2) Andrew Wyke (Laurence Olivier) and Milos Tindle (Michael Caine) in Sleuth (1972): ' I'm in the pink of condition. I could copulate for England at any distance.'