Meaning

• Two similar or identical things taken together; often followed by of.

  "I couldn't decide which of the pair of designer shirts I preferred, so I bought the pair."

• Two people in a relationship, partnership or friendship.

  "Spouses should make a great pair."

• Used with binary nouns (often in the plural to indicate multiple instances, since such nouns are plural only, except in some technical contexts)

  "a pair of scissors; two pairs of spectacles; several pairs of jeans"

• A couple of working animals attached to work together, as by a yoke.

  "A pair is harder to drive than two mounts with separate riders."

• A poker hand that contains two cards of identical rank, which cannot also count as a better hand.

• A score of zero runs (a duck) in both innings of a two-innings match.

• A double play, two outs recorded in one play.

  "They turned a pair to end the fifth."

• A doubleheader, two games played on the same day between the same teams

  "The Pirates took a pair from the Phillies."

• A boat for two sweep rowers.

• A pair of breasts

  "She's got a gorgeous pair."

• 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.

• 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.

  "There were two pairs on the final vote."

• A number of things resembling one another, or belonging together; a set.

• (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.

Meaning

• An exciting or extraordinary scene, exhibition, performance etc.

  "The horse race was a thrilling spectacle."

• An embarrassing or unedifying scene or situation.

  "He made a spectacle out of himself."

• (usually in the plural) An optical instrument consisting of two lenses set in a light frame, and worn to assist sight, to obviate some defect in the organs of vision, or to shield the eyes from bright light.

• An aid to the intellectual sight.

• A spyglass; a looking-glass.

• The brille of a snake.

• A frame with different coloured lenses on a semaphore signal through which light from a lamp shines at night, often a part of the signal arm.

Meaning

• A pair of lenses set in a frame worn on the nose and ears in order to correct deficiencies in eyesight or to ornament the face.