canary

nouns

someone acting as an informer or decoy for the police
canary, fink, sneak, sneaker, snitch, snitcher, stool pigeon, stoolie, stoolpigeon
a female singer
canary
domain usage
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
colloquialism
is a type of (narrower)
a person who sings
singer, vocaliser, vocalist, vocalizer
a moderate yellow with a greenish tinge
canary, canary yellow
any of several small Old World finches
canary, canary bird

adjectives

having the color of a canary; of a light to moderate yellow
canary, canary-yellow