center

The point in the interior of a circle that is equidistant from all points on the circumference.

The point in the interior of a sphere that is equidistant from all points on the circumference.

The middle portion of something; the part well away from the edges.

To cause (an object) to occupy the center of an area.

"He centered the heading of the document."

To cause (some attribute, such as a mood or voltage) to be adjusted to a value which is midway between the extremes.

To give (something) a central basis.

Of, at, or related to a center.