/berrk"shear, -sheuhr/ ; Brit. /bahrk"shear, -sheuhr/ , n.
1. Also called Berks /berrks/ ; Brit. /bahrks/ . a county in S England. 658,300; 485 sq. mi. (1255 sq. km).
2. one of an English breed of black hogs, having white markings on the feet, face, and tail.
3. a steam locomotive having a two-wheeled front truck, eight driving wheels, and a four-wheeled rear truck. See table under Whyte classification .