1. (n.) A number of things resembling one another, or belonging together; a set; as, a pair or flight of stairs. A pair of beads. Chaucer. Beau. & Fl. Four pair of stairs. Macaulay. [Now mostly or quite disused, except as to stairs.]

2. (n.) Two things of a kind, similar in form, suited to each other, and intended to be used together; as, a pair of gloves or stockings; a pair of shoes.

3. (n.) Two of a sort; a span; a yoke; a couple; a brace; as, a pair of horses; a pair of oxen.

4. (n.) A married couple; a man and wife.

5. (n.) A single thing, composed of two pieces fitted to each other and used together; as, a pair of scissors; a pair of tongs; a pair of bellows.

6. (n.) 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; as, there were two pairs on the final vote.

7. (n.) In a mechanism, two elements, or bodies, which are so applied to each other as to mutually constrain relative motion.

8. (v. i.) To be joined in pairs; to couple; to mate, as for breeding.

9. (v. i.) To suit; to fit, as a counterpart.

10. (v. i.) Same as To pair off. See phrase below.

11. (v. t.) To unite in couples; to form a pair of; to bring together, as things which belong together, or which complement, or are adapted to one another.

12. (v. t.) To engage (one's self) with another of opposite opinions not to vote on a particular question or class of questions.

13. (v. t.) To impair.

Gaussian integer accouple accumulate ace affiliate agglomerate agglutinate aggregate aggroup algebraic number ally amass articulate assemble associate band band together batch be in cahoots best bower bond both bower brace bracket bridge bridge over bring together bulk bunch bunch together bunch up cabal cardinal cardinal number cards cement cement a union centralize chain clap together club club together clubs clump cluster collect colligate collocate combine come together compare compile complex number comprise concatenate confederate conglobulate conglomerate conjoin conjugate connect consociate conspire copulate corral couple couple up couplet cover craps cumulate deck defective number deuce diamonds dig up distich double double harness double-harness double-team doublet doubleton draw together dredge up drive together duad duet dummy duo dyad embrace encompass equipage even number face cards federalize federate finite number flush four-in-hand fraction full house gang gang up gather gather in gather together get in get together glue go in partners go in partnership group hand hearts hook up with imaginary number impair include infinity integer irrational irrational number jack join join forces join fortunes with join together join up with join with joker juxtapose king knave knot lay together league left bower link look-alikes lump together make up marry marshal mass match matching pair mate mates merge mixed number mobilize muster ordinal organize pack pair off partner picture cards piece together playing cards polygonal number prime number pure imaginary put together queen raise rake up rally randem rational rational number real real number rectangular number rig roll into one round round number round up royal flush rubber ruff scrape together serial number set set of two singleton snake eyes solder spades span spike spike team splice stand together stand up with stick together straight surd take in take up tandem tape team team up team up with team with the two three-up throw in with tie tie in with tie up with transcendental number transfinite number trey trick trump turnout twain twin twins two twosome unicorn unify unionize unite unite with wed weld whip in whole number yoke