Definitions
1.nounThe house sparrow, Passer domesticus; a small bird with a short bill, and brown, white and gray feathers.
2.nounA member of the family Passeridae, comprising small Old World songbirds.
3.nounA member of the family Emberizidae, comprising small New World songbirds.
4.nounGenerically, any small, nondescript bird.
5.nounA quick-witted, lively person. Often used in the phrase cockney sparrow.