A Pair

1. Two similar or identical things takentogether; often followed by of.
2. Two people in a relationship, partnershipor friendship.
3. Used with binary nouns (often in the plural to indicate multiple instances, since such nouns are plural only)
4. A couple of working animals attached to work together, as by a yoke.
5. (card games) A poker hand that contains two cards of identical rank, which cannot also count as a better hand.
6. (cricket) A score of zero runs (a duck) in both innings of a two-innings match
7. (baseball, informal) A double play, two outs recorded in one play
8. (baseball, informal) A doubleheader, two games played on the same day between the same teams
9. (rowing) A boat for two sweep rowers.
10. (slang) A pair of breasts
11. (Australia, politics) The exclusion of one member of a parliamentary party from a vote, if a member of the other party is absent for important personal reasons.
12. Two members of opposite parties or opinion, as in a parliamentary body, who mutually agree not to vote on a given question, or on issues of a party nature during a specified time.
13. (archaic) A number of things resembling one another, or belonging together; a set.
14. (kinematics) In a mechanism, two elements, or bodies, which are so applied to each other as to mutually constrain relative motion; named in accordance with the motion it permits, as in turning pair, sliding pair, twisting pair.

Synonyms

• (two objects in a group): duo, dyad, couple, brace, twosome, duplet
• (pair of breasts): See breasts