| 1. | any of several small, chiefly Old World songbirds of the subfamily Sylviidae. Compare blackcap (def. 1), reed warbler. |
| 2. | Also called wood warbler. any of numerous small New World songbirds of the family Parulidae, many species of which are brightly colored. Compare yellow warbler. |
| 3. | a person or thing that warbles. |