Noun hub has 2 senses
- hub - the central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes
--1 is a kind of part, portion
--1 is a part of car wheel; electric fan, blower; propeller, propellor
- hub - 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"
--2 is a kind of center, centre, middle, heart, eye
--2 has particulars: civic center, municipal center, down town
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