Quick definitions from WordNet (pair)

▸ noun:  a poker hand with 2 cards of the same value
▸ noun:  two people considered as a unit
▸ noun:  a set of two similar things considered as a unit
▸ noun:  two items of the same kind
▸ verb:  form a pair or pairs ("The two old friends paired off")
▸ verb:  arrange in pairs ("Pair these numbers")
▸ verb:  occur in pairs
▸ verb:  make love
▸ verb:  bring two objects, ideas, or people together ("The student was paired with a partner for collaboration on the project")
▸ name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #11481)

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▸ Also see pair