hub  /ˈhʌb/  noun

  • [count]

    1 . the central and most active part or place

    • the hub of the city
    • The island is a major tourist hub. [=a place where many tourists go]
    • She was at the hub of all the activity.

    2 . the airport or the city through which an airline sends most of its flights

    • All of the airline’s coast-to-coast flights pass through its hub.

    3 . the center of a wheel, propeller, fan, etc.

    • The spokes attach to the hub of the wheel.