What is the meaning of Sparrow?

The house sparrow, Passer domesticus; a small bird with a short bill, and brown, white and gray feathers.

A member of the family Passeridae, comprising small Old World songbirds.

A member of the family Emberizidae, comprising small New World songbirds.

Generically, any small, nondescript bird.

A quick-witted, lively person.

Source: wiktionary.org