Dictionary
kill•er
Pronunciation: (kil'ur), [key]—
n.
1. a person or thing that kills.
2. See
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.
—
adj.
severe; powerful:
a killer cold. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.