What does "finch" mean?

Finch: A small singing bird of many genera and species, belonging to the family Fringillidæ. Note: The word is often used in composition, as in chaffinch, goldfinch, grassfinch, pinefinch, etc. Bramble finch. See Brambling. -- Canary finch, the canary bird. -- Copper finch. See Chaffinch. -- Diamond finch. See under Diamond. -- Finch falcon (Zoöl.), one of several very small East Indian falcons of the genus Hierax. -- To pull a finch, to swindle an ignorant or unsuspecting person. [Obs.] "Privily a finch eke could he pull." Chaucer.