The noun pair has 4 senses (first 3 from tagged texts)
1. (18) pair, brace -- (a set of two similar things considered as a unit)
2. (10) couple, pair, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, dyad, duad -- (two items of the same kind)
3. (7) pair -- (two people considered as a unit)
4. pair -- (a poker hand with 2 cards of the same value)
Overview of verb pair
The verb pair has 5 senses (first 2 from tagged texts)
1. (3) pair, pair off, partner off, couple -- (form a pair or pairs; "The two old friends paired off")
2. (2) 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")
3. pair, geminate -- (occur in pairs)
4. pair, geminate -- (arrange in pairs; "Pair these numbers")
5. copulate, mate, pair, couple -- (make love; "Birds mate in the Spring")