Main Entry: hub

Pronunciation: \ˈhəb\

Function: noun

Etymology: probably alteration of ²hob

Date: 1649

1 : the central part of a circular object (as a wheel or propeller)
2 a : a center of activity : focal point b : an airport or city through which an airline routes most of its traffic c : a central device that connects multiple computers on a single network
3 : a steel punch from which a working die for a coin or medal is made