center

Center has a number of meanings.

1. 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. See also center of symmetry.
2. The standard name given to a position on the field in several sports, such as American football, basketball, netball, amongst others. See: center (American football), Center (basketball), centre (rugby), centre (ice hockey).
3. The center of power in a country is the capital.
4. Major social or political movements often have one or more centers or headquarters around which they are focussed and from where they are directed.