5. (verb)pair, pair off, partner off, couple form a pair or pairs
"The two old friends paired off"
6. (verb)match, mate, couple, pair, twin bring two objects, ideas, or people together
"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"
7. (verb)pair, geminate occur in pairs
8. (verb)pair, geminate arrange in pairs
"Pair these numbers"
9. (verb)copulate, mate, pair, couple engage in sexual intercourse "Birds mate in the Spring"