- A point or place that is equally distant from the sides or outer boundaries of something; the middle: the center of a stage. (noun)
- A point equidistant from the vertices of a regular polygon. (noun)
- A point equidistant from all points on the circumference of a circle or on the surface of a sphere. (noun)
- A point around which something rotates or revolves: The sun is the center of our solar system. (noun)
- A part of an object that is surrounded by the rest; a core: chocolates with soft centers. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.