| Noun | 1. | working dog - any of several breeds of usually large powerful dogs bred to work as draft animals and guard and guide dogsCanis familiaris, dog, domestic dog - a member of the genus Canis (probably descended from the common wolf) that has been domesticated by man since prehistoric times; occurs in many breeds; "the dog barked all night" sheep dog, sheepdog, shepherd dog - any of various usually long-haired breeds of dog reared to herd and guard sheep police dog - any dog trained to assist police especially in tracking Sennenhunde - any of four Swiss breeds boxer - a breed of stocky medium-sized short-haired dog with a brindled coat and square-jawed muzzle developed in Germany mastiff - an old breed of powerful deep-chested smooth-coated dog used chiefly as a watchdog and guard dog bull mastiff - large powerful breed developed by crossing the bulldog and the mastiff bulldog, English bulldog - a sturdy thickset short-haired breed with a large head and strong undershot lower jaw; developed originally in England for bull baiting Great Dane - very large powerful smooth-coated breed of dog guide dog - a dog trained to guide the blind hearing dog - dog trained to assist the deaf by signaling the occurrence of certain sounds Saint Bernard, St Bernard - a Swiss alpine breed of large powerful dog with a thick coat of hair used as a rescue dog seizure-alert dog - a dog that can alert or assist people with seizure disorders sled dog, sledge dog - a dog trained to draw a sled usually in a team Eskimo dog, husky - breed of heavy-coated Arctic sled dog |