Definition of hub
1
: the central part of a circular object (such as a wheel or propeller)
spokes attached to the hub of the wheel
2a
: a center of activity : focal point
The island is a major tourist hub.
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 (see network entry 1 sense 3b)
3
: a steel punch from which a working die (see die entry 2 sense 3a) for a coin or medal is made
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Merriam-Webster unabridged
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Time Traveler for hub
The first known use of hub was in 1649
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