1. the central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes
2. a center of activity or interest or commerce or transportation; a focal point around which events revolve
- the playground is the hub of parental supervision
- the airport is the economic hub of the area
Sentences with hub as a noun:
- Hongkong airport is one of the most important air traffic hubs in Asia.
- a hub in the road