1.
A point or place that is equally distant from the sides or outer boundaries of something; the middle: the center of town; the center of a stage.
2.
a. A point equidistant from the vertexes of a regular polygon. b. A point equidistant from all points on the circumference of a circle or on the surface of a sphere.
3. A point around which something rotates or revolves: The sun is the center of our solar system.
4. A part of an object that is surrounded by the rest; a core: chocolates with soft centers.
5. a. A place where a particular activity or service is concentrated: a medical center. b. A point of origin, as of influence, ideas, or actions: a center of power; a center of unrest. c. An area of dense population: a metropolitan center.
6. A person or thing that is the chief object of attention, interest, activity, or emotion.
7. A person, object, or group occupying a middle position.
8. Often Center A political group or a set of policies representing a moderate view between those of the right and the left.
9. Physiology. A group of neurons in the central nervous system that control a particular function: the vasomotor center.
10. Sports. A player who holds a middle position on the field, court, or forward line in some team sports, such as football and basketball.
11. Baseball. Center field.
12. a. A small conical hole made in a piece of work with a center punch so that a drill can be accurately positioned within it. b. A bar with a conical point used to support work, as during turning on a lathe.