Any of several large harmless rodent-eating North American burrowing snakes; SYN. bullsnake. bull-snake
Any of several large harmless constricting colubrid snakes (genus Pituophis) especially of the central and western United States that feed chiefly on rodents and are classified either as subspecies of the pine snake (p. melanoleucus) or as subspecies of their own species (p. catenifer) — called also gopher snake