1. (noun) the central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes

• part
• portion

2. (noun) a center of activity or interest or commerce or transportation; a focal point around which events revolve

• center
• centre
• eye
• heart
• middle

1. (noun) a center of activity or interest or commerce or transportation; a focal point around which events revolve

• civic center
• down town
• municipal center