hub

1. The central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes (synset 103552838)
   is a type of: part, portion - something less than the whole of a human artifact
   is a part of:

   • car wheel - a wheel that has a tire and rim and hubcap; used to propel the car
   • blower, electric fan - a fan run by an electric motor
   • propeller, propellor - a mechanical device that rotates to push against air or water
2. A center of activity or interest or commerce or transportation;
   A focal point around which events revolve (synset 108560786)
   "the playground is the hub of parental supervision"; "the airport is the economic hub of the area"
   is a type of: center, centre, eye, heart, middle - an area that is approximately central within some larger region
   subtypes: civic center, down town, municipal center - the center of a city

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