Definition of: bulldog

(bl′dôg′, -dog′) noun
1. A medium-sized, short-haired, powerful dog, originally bred in England for use in bull-baiting: also called English bulldog.
2. A pistol; especially, a short-barreled revolver of large caliber: also, formerly, a cannon.
—adjective Resembling a bulldog; courageous; tenacious.
—v.t. U.S. Colloq. To throw (a steer) by gripping its horns and twisting its neck.
BULLDOG
(About 16 inches high at the shoulders)