coupling

(noun) a connection (like a clamp or vise) between two things so they move together. Synonyms: yoke.

(noun) a mechanical device that serves to connect the ends of adjacent objects. Synonyms: coupler.

(noun) the act of pairing a male and female for reproductive purposes. Synonyms: mating, pairing, conjugation, union, sexual union. Examples: "The casual couplings of adolescents." "The mating of some species occurs only in the spring."

(verb) bring two objects, ideas, or people together. Synonyms: match, mate, couple, pair, twin. Examples: "This fact is coupled to the other one." "Matchmaker, can you match my daughter with a nice young man?." "The student was paired with a partner for collaboration on the project."

(verb) link together. Synonyms: couple, couple on, couple up. Example: "Can we couple these proposals?."

(verb) form a pair or pairs. Synonyms: pair, pair off, partner off, couple. Example: "The two old friends paired off."

(verb) engage in sexual intercourse. Synonyms: copulate, mate, pair, couple. Example: "Birds mate in the spring."