turn

To cause to move around an axis or center; cause to rotate or revolve.

To cause to move around in order to achieve a result, such as opening, closing, tightening, or loosening.

To alter or control the functioning of (a mechanical device, for example) by the use of a rotating or similar movement.

To perform or accomplish by rotating or revolving.

To change the position of so that the underside becomes the upper side.