(genetics) One thousand base pairs in succession (used as a measure of the size of a nucleic acid or a gene)

(chiefly Britain, rare or dated) A flight of stairs

(transitive) To put into pairs; to put into a group of two. / (intransitive) To get into pairs; to join together to make a group of two.

(intransitive) To separate into groups of two. / (transitive) To join two people into a relationship.

(physics) The simultaneous creation of a particle and its antiparticle.

A 16th-century English gambling card game.

(chiefly US, colloquial, idiomatic, somewhat vulgar) Synonym of grow a pair

A form of electrical connection in which two insulated conductors are twisted together for the purpose of improving immunity to interference.

(category theory) A couple of morphisms which constitute the pullback of a given morphism along itself.

(poker) A pair consisting of one hole card and the highest-ranking community card.