A point or place that is equally distant from the sides or outer boundaries of something; the middle: the center of a stage. A point equidistant from the vertices of a regular polygon. A point equidistant from all points on the circumference of a circle or on the surface of a sphere. A point around which something rotates or revolves: The sun is the center of our solar system. A part of an object that is surrounded by the rest; a core: chocolates with soft centers. A place where a particular activity or service is concentrated: a medical center. A point of origin, as of influence, ideas, or actions: a center of power; a center of unrest. An area of dense population: a metropolitan center. A person or thing that is the chief object of attention, interest, activity, or emotion. A person, object, or group occupying a middle position. A political group or a set of policies representing a moderate view between those of the right and the left. Physiology A group of neurons in the central nervous system that control a particular function: the vasomotor center. Sports A player who holds a middle position on the field, court, or forward line in some team sports, such as football and basketball. Baseball Center field. A small conical hole made in a piece of work with a center punch so that a drill can be accurately positioned within it. A bar with a conical point used to support work, as during turning on a lathe. Architecture A centering. To place in or at the center: centered the vase on the table. To direct toward a center or central point; concentrate or focus: tried to center the discussion on the main issues. Sports To pass (a ball or puck) toward the center of a playing area. Sports To play as a center on (a line), as in ice hockey. Football To pass (the ball) back between the legs to begin a down. To be concentrated; cluster: The epidemic centered in the urban areas. To have a central theme or concern; be focused: Her novels center on the problems of adolescence. Sports To play as a center.