Pronunciation: (blak'snāk"),[key] —n. 1. Also called black racer. a blackish racer, Coluber constrictor subspecies, of the eastern U.S., that grows to a length of 6 ft. (1.8 m).
2. any of various other snakes of a black or very dark color.
3. a heavy, tapering, flexible whip of braided cowhide or the like. Also,black' snake".