Dictionary
check•rein
Pronunciation: (chek'rān"), [key]—
n.
1. a short rein passing from the bit to the saddle of a harness, to prevent the horse from lowering its head. Cf.
overcheck (def. 2),
sidecheck. See illus. under
harness.
2. a short rein joining the bit of one of a span of horses to the driving rein of the other.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.