Center: Definition and Links by Encyclopedian.com

Center is also spelled centre.

In geometry, a point that is well-distant from the boundaries[?] of a figure. For instance, for a circle, the center is defined as the point equidistant from all points on the circle's boundary. Similar definitions can be made for other shapes in various geometries, though for arbitrary complex shapes there may be several definitions considered appropriate in some circumstances.
The standard name given to a position on the field in several sports, such as American football, basketball, netball, amongst others.
The center of power in a country is the capital.
Centre is a low-lying region of France in the centre of the country.
Center is also the name of two towns in Wisconsin.
Cities often are said to have a center.