spectacles

1. 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.

2. Two people in a relationship, partnership or friendship.

   Spouses should make a great pair.

3. 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

4. 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.

5. A poker hand that contains two cards of identical rank, which cannot also count as a better hand.
6. A score of zero runs (a duck) in both innings of a two-innings match.
7. A double play, two outs recorded in one play.

   They turned a pair to end the fifth.

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

   The Pirates took a pair from the Phillies.

9. A boat for two sweep rowers.
10. A pair of breasts

    She's got a gorgeous pair.

11. 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.

    There were two pairs on the final vote.

13. 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.

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

   The horse race was a thrilling spectacle.

2. An embarrassing or unedifying scene or situation.

   He made a spectacle out of himself.

3. (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.
4. An aid to the intellectual sight.
5. A spyglass; a looking-glass.
6. The brille of a snake.
7. 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.

noun

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.