- pair [per]n.pl. pairs or pair [ME paire < OFr < L paria, neut. pl. of par, equal: see PAR1]1. two similar or corresponding things joined, associated, or used together [a pair of gloves]2. a single thing made up of two corresponding parts that are used together [a pair of pants]3. two persons or animals; specif.,a) a married, engaged, or courting coupleb) two mated animalsc) any two people considered as having something in common [a pair of thieves]d) a brace; span [a pair of oxen]e) two legislators on opposing sides of some question who agree to withhold their vote so as to offset each other; also, such an agreement4. two playing cards of the same denomination5. Chiefly Dial. a set or series [a pair of stairs, a pair of beads]vt.1. to make a pair of (two persons or things) by matching, joining, mating, etc.2. to arrange in pairs3. to provide with a partner: followed by withvi.1. to form a pair; match2. to join in marriage; mate——————pair off1. to join or arrange (two people or things) in a pair2. to go apart or separate into pairsSYN.- PAIR is used of two similar things that are associated together or are necessary in twos for proper use [a pair of socks ] or of a single thing made up of two corresponding parts [a pair of scissors ]; COUPLE applies to any two similar things that are somehow associated [a couple of dollars ], or it is used colloquially to mean several or a few [I must buy a couple of things ]; a BRACE1 is a couple, especially of certain birds or animals [a brace of pheasants, hounds, etc. ]; YOKE applies to a pair of animals harnessed together for pulling [a yoke of oxen ]; SPAN1 is used especially of a pair of horses harnessed together
English World dictionary. V. Neufeldt. 2014.