| n. | 1. | |
| 1. | One who, or that which, whistles, or produces or a whistling sound. | |
| 2. | (Zool.) The ring ousel. | |
| 3. | (Zool.) The hoary, or northern, marmot (Arctomys pruinosus). | |
| 4. | (Zool.) The whistlefish. |
| Noun | 1. | Whistler - United States painter (1834-1903) Synonyms: James Abbott McNeill Whistler |
| 2. | whistler - makes a loud high sound | |
| 3. | whistler - large North American mountain marmot | |
| 4. | whistler - large-headed swift-flying diving duck of arctic regions Synonyms: Bucephela clangula, goldeneye | |
| 5. | whistler - Australian and southeastern Asian birds with a melodious whistling call Synonyms: thickhead |