the central part, usually cylindrical, of a wheel; the nave. see illust. of axle box.-the hilt of a weapon.-a rough protuberance or projecting obstruction; as, a hub in the road. [u.s.] see hubby.-a goal or mark at which quoits, etc., are cast.-a hardened, engraved steel punch for impressing a device upon a die, used in coining, etc.-a screw hob. see hob, 3.-a block for scotching a wheel.