1.The central part, usually cylindrical, of a wheel; the nave.
4.A goal or mark at which quoits, etc., are cast.
5.(Diesinking) A hardened, engraved steel punch for impressing a device upon a die, used in coining, etc.
7.A block for scotching a wheel.
8.The central location within which activities tend to concentrate, or from which activities radiate outward; a focus of activity.
9.Hence: (Aeronautics) A large airport used as a central transfer station for an airline, permitting economic air transportation between remote locations by directing travellers through the hub, often changing planes at the hub, and thus keeping the seat occupancy rate on the airplanes high. The hub together with the feeder lines from remote locations constitute the so-called hub and spoke system of commercial air passenger transportation. A commercial airline may have more than one such hub.
10.The city of Boston, Massachusetts referred to locally by the nickname The Hub.