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English definition of “hub”

hub

noun [C]     /hʌb/
the central or main part of something, where there is most activity: Property rentals in Mumbai, India's commercial hub, are the highest in the world. New Orleans has traditionally been the financial hub of southeast Louisiana.
IT a machine that connects several computers together: an ethernet hub
TRANSPORT →  hub airport
at/in the hub of things in the place where things happen and decisions are taken: It's that kind of attitude that will keep him in the hub of things for quite some time.
→ See also transportation hub, transport hub
(Definition of hub noun from the Cambridge Business English Dictionary © Cambridge University Press)
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