A turn, or rotation, refers to the circular movement of an object around a central point or axis. This motion can be observed in various contexts, such as the spinning of a top or the rotation of the Earth around its axis, which results in day and night. In mathematics, a turn is often described in degrees, with a full rotation equaling 360 degrees. Rotations can be clockwise or counterclockwise, and they are fundamental in geometry, where shapes can be rotated to explore their properties and symmetries.