/chek"rayn'/ , 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.
[ 1800-10; CHECK 1 + REIN ]