hub

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