propeller

noun4

1. •
   One who, or that which, propels.
2. •
   A mechanical device with evenly-shaped blades that turn on a shaft to push against air or water, especially one used to propel an aircraft or boat.

   • The plane’s propeller spun rapidly before takeoff.
   • The boat is powered by a single propeller.
3. •
   A spinnerbait.
4. •
   A steamboat thus propelled; a screw steamer.