bulldog Syllabification: (bull·dog)Pronunciation: /ˈbo͝olˌdôg/Translate bulldog | into French | into German | into Italian | into Spanish Definition of bulldog noun a dog of a sturdy smooth-haired breed with a large head and powerful protruding lower jaw, a flat wrinkled face, and a broad chest. a person noted for courageous or stubborn tenacity: [as modifier]:the bulldog spirit informal (at Oxford and Cambridge Universities) an official who assists the proctors, especially in disciplinary matters. verb (bulldogs, bulldogging, bulldogged) [with object] North American wrestle (a steer) to the ground by holding its horns and twisting its neck: (as noun bulldogging)cowboys compete in bulldogging and bareback ridingDerivatives bulldogger noun bulldog in other Oxford dictionaries Definition of bulldog in the British & World English dictionary