hub is the dictionary form of hubs Definition of hub
1
[ noun ] the central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes
2
[ noun ] a center of activity or interest or commerce or transportation; a focal point around which events revolve

Examples

"the playground is the hub of parental supervision" "the airport is the economic hub of the area"

3
[ noun ] the center of a city
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