coupling

1 a place where two or more things are united the coupling between two train cars Synonyms connection, joint, join, joining, jointure, junction, junctureRelated Words link, nexus, tie; interconnection, intersection; abutment, articulation, attachment; seam, suture; concourse, confluence, meeting; unionNear Antonyms cleft, crack, crevice, fissure, gap, rift, separation

2 the act or an instance of joining two or more things into one credited with the coupling of several existing ideas into a single thesis Synonyms combination, combining, connecting, connection, consolidation, union, junction, linking, merger, merging, unificationRelated Words agglomeration, amalgamation, blend, coalescence, commingling, compounding, fusion, intermingling, intermixture, mingling, mix, mixture, synthesis; reunification, reunionNear Antonyms detachment, divorcement, separation, severanceAntonyms breakup, disconnection, dissolution, disunion, division, parting, partition, schism, scission, split

3 sexual union involving penetration of the vagina by the penis the zoo announced that the giant pandas' most recent coupling was successful and that a cub was expected in March Synonyms coition, coitus, commerce, congress, copulating, copulation, sexual intercourse, intercourse, lovemaking, mating, relations, sex, sex act, sexual relationsRelated Words fornication; safe sex; carnality, sexuality; breeding, insemination; dalliance, hanky-panky, whoopee