CANARY

Definition

1. adjective having the color of a canary. — synonyms: canary-yellow
2. noun someone acting as an informer or decoy for the police. — synonyms: fink, snitch, snitcher, stoolpigeon, stool_pigeon, stoolie, sneak, sneaker
3. noun a female singer.
4. noun a moderate yellow with a greenish tinge. — synonyms: canary_yellow
5. noun any of several small Old World finches. — synonyms: canary_bird