One who, or that which, warbles; a singer; a songster; -- applied chiefly to birds.
- Any of various small New World songbirds of the family Parulidae, many of which have brightly colored plumage or markings, as the redstart and the chat. Also called wood warbler.
- Any of various small, often brownish or grayish Old World songbirds of the family Silviidae, as the blackcap and the whitethroat.
- Music One that warbles; a singer.