hub

/hʌb/
noun
  1. The central part of a wheel that rotates around the axle.
    • The bicycle wheel's hub needs to be greased regularly.
    • The spokes connect the rim to the hub of the wheel.
    • He replaced the rusty hub on the old wagon wheel.
  2. A center of activity, interest, or importance.
    • The library serves as a community hub for students and residents.
    • The airport is a busy hub for flights across the country.
    • New York City is a major hub for finance and culture.
  3. A device used to connect multiple computers or devices in a network.
    • We connected all the office computers to a central hub.
    • He plugged the ethernet cables into the hub to set up the local network.
    • The network hub allows data to flow between devices.