noun The point in the interior of a circle that is equidistant from all points on the circumference. .mw-parser-output .defdate{font-size:smaller}
noun The point in the interior of a sphere that is equidistant from all points on the circumference.
noun The middle portion of something; the part well away from the edges. The innermost point of the Earth, or the Earth itself, as the center or foundation of the Universe; the center or foundation of the Universe abstractly.
noun The innermost point of the Earth, or the Earth itself, as the center or foundation of the Universe; the center or foundation of the Universe abstractly.
noun The point on a line that is midway between the ends.
noun The point in the interior of any figure of any number of dimensions that has as its coordinates the arithmetic mean of the coordinates of all points on the perimeter of the figure (or of all points in the interior for a center of volume).
The centroid is one of the centres of a triangle
noun A point on a triangle's plane that is in some sense in its middle.
There are several centers of a triangle such as its circumcenter, incenter, orthocenter and centroid.
noun A place, especially a building or complex, set aside for some specified function or activity.
shopping center, convention center, civic center, garment center, Lincoln Center for the Performing Arts, Rockefeller Center