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.

To spade or plow (soil) to bring the undersoil to the surface.

To reverse and resew the material of (a collar, for example).

To revolve in the mind; meditate on; ponder.