noun

• The central part, usually cylindrical, of a wheel; the nave.
• A point where many routes meet and traffic is distributed, dispensed, or diverted.
• A central facility providing a range of related services, such as a medical hub or an educational hub.
• (networking) A computer networking device connecting several Ethernet ports. See switch.
• (surveying) A stake with a nail in it, used to mark a temporary point.
• A male weasel; a buck; a dog; a jack.
• (US) A rough protuberance or projecting obstruction.
• (video games) An area in a video game from which individual levels are accessed.
• A goal or mark at which quoits, etc., are thrown.
• A hardened, engraved steel punch for impressing a device upon a die, used in coining, etc.
• A screw hob.
• A block for scotching a wheel.