Definition of hub

• n. - The central part, usually cylindrical, of a wheel; the nave. See Illust. of Axle box.
• n. - The hilt of a weapon.
• n. - A rough protuberance or projecting obstruction; as, a hub in the road. [U.S.] See Hubby.
• n. - A goal or mark at which quoits, etc., are cast.
• n. - A hardened, engraved steel punch for impressing a device upon a die, used in coining, etc.
• n. - A screw hob. See Hob, 3.
• n. - A block for scotching a wheel.