definition of
pair

[1] #1 pair n. [brace] a set of two similar things considered as a unit. wn

[2] #2 pair n. [couple, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, dyad, duad] two items of the same kind. wn

[3] #3 pair n. two people considered as a unit. wn

[4] #4 pair v. [pair off, partner off, couple] form a pair or pairs; "The two old friends paired off". wn

[5] #5 pair v. [match, mate, couple, 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". wn