hub
noun [ C ]
uk/hʌb/ usthe 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