noun A device that has a helical function. A simple machine, a helical inclined plane. A (usually) metal fastener consisting of a partially or completely threaded shank, sometimes with a threaded point, and a head used to both hold the top material and to drive the screw either directly into a soft material or into a prepared hole. A ship's propeller. An Archimedes screw. A steam vessel propelled by a screw instead of wheels.
noun A simple machine, a helical inclined plane.
noun A (usually) metal fastener consisting of a partially or completely threaded shank, sometimes with a threaded point, and a head used to both hold the top material and to drive the screw either directly into a soft material or into a prepared hole.
noun A ship's propeller.
noun An Archimedes screw.
noun A steam vessel propelled by a screw instead of wheels.
noun The motion of screwing something; a turn or twist to one side.