A machine used to trim the sails. It consists of a drum around which a line is wrapped and an internal ratchet, which allows the drum to turn in one direction. The winch works as a wheel-and-axle type of machine and it is often equipped with a handle to increase the mechanical advantage even further.
a machine for lifting and lowering cargo, and for other purposes that cannot be handled by manual power; it consists of a drum or barrel around which a rope or cable is wound to achieve either a lifting or lowering motion; the drum rotates in a horizontal axis and may be powered by steam or hydraulic motor or electric motor
A winch is a mechanical device that is used to wind up a rope or wire rope (also called "cable"). In its simplest form it consists of a spool and attached crank. The spool can also be called the winch drum.