| 1. | a person or thing that kills. |
| 2. | killer whale. |
| 3. | a device used by a post office for printing cancellations on postage stamps. |
| 4. | a mark of cancellation made on a postage stamp. |
| 5. | Slang. something or someone having a formidable impact, devastating effect, etc.: The math test was a real killer. |
| 6. | severe; powerful: a killer cold. |
| 7. | very difficult or demanding: a killer chess tournament. |
| 8. | highly effective; superior: a killer recipe for fried chicken. |
killer
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