pair

(noun) a set of two similar things considered as a unit. Synonyms: brace.

(noun) two items of the same kind. Synonyms: couple, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, dyad, duad.

(noun) two people considered as a unit.

(noun) a poker hand with 2 cards of the same value.

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

(verb) bring two objects, ideas, or people together. Synonyms: match, mate, couple, 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) occur in pairs. Synonyms: geminate.

(verb) arrange in pairs. Synonyms: geminate. Examples: "Pair these numbers."

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