3. Same as To pair off. See phrase below. To pair off, to separate from a company in pairs or couples; specif., to agree with one of the opposite party or opinion to abstain from voting on specified questions or issues. See pair.
Origin: Paired; Pairing.
6. 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.
pairs are named in accordance with the kind of motion they permit; thus, a journal and its bearing form a turning pair, a cylinder and its piston a [[sliding Pair, a screw and its nut a twisting pair, etc. Any pair in which the constraining contact is along lines or at points only (as a cam and roller acting together), is designated a higher pair; any pair having constraining surfaces which fit each other (as a cylindrical pin and eye, a screw and its nut, etc), is called a lower pair. Pair royal (pl. Pairs royal) three things of a sort; used especially of playing cards in some games, as cribbage; as three kings, three eight spots etc. Four of a kind are called a double pair royal. Something in his face gave me as much pleasure as a pair royal of naturals in my own hand. . That great pair royal of adamantine sisters [the Fates] . [Written corruptly parial and prial.
Originally, pair was not confined to two things, but was applied to any number of equal things (pares), that go together. Ben Jonson speaks of a pair (set) of chessmen; also, he and lord bacon speak of a pair (pack) of cards. A pair of stairs is still in popular use, as well as the later expression, flight of stairs.
(Science: zoology) see fin.