Pronunciation: (krup'ur, kroop'-), [key]
1. a leather strap fastened to the saddle of a harness and looping under the tail of a horse to prevent the harness from slipping forward. See illus. under harness.
2. the rump or buttocks of a horse.
3. armor for the rump of a horse.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.