definition of
coupling

[1] #1 coupling n. [yoke] a connection (like a clamp or vise) between two things so they move together. wn

[2] #2 coupling n. [coupler] a mechanical device that serves to connect the ends of adjacent objects. wn

[3] #3 coupling n. [mating, pairing, conjugation, union, sexual union] the act of pairing a male and female for reproductive purposes; "the casual couplings of adolescents"; "the mating of some species occurs only in the spring". wn