noun.
One who or that which propels; in marine engineering, broadly, any contrivance or appliance, as a sail, paddle, oar, paddle-wheel, screw, etc., used for moving vessels floating upon the surface of water, or under the surface; in a more restricted and more generally accepted sense, any instrument or appliance, and especially a screw, used for marine propulsion and actuated by machinery (usually a steam-engine called a marine engine) carried by the vessel so propelled.
noun.
A boat or vessel driven by a propeller.
noun.
In fishing, a kind of trolling-hook with artificial bait, fitted with wings or flanges to make it spin in the water; a spinning-bait.
noun.
See the qualifying words.
noun.
In electricity, in the tangential system of traction, the moving part of the system, corresponding to the rotor of an alternator, which is drawn along by the inductive action of the stator-coils between the track and thus affords motive power for the attached cars.