Added 10 October 2026 propeller /pɹəˈpɛl.ə/ noun Categories: ThingsRare Words In Latin: helix Wiktionary noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about propeller at Wordnik → Where our words come from → One who, or that which, propels. 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. A steamboat thus propelled; a screw steamer. Related Words: propellorpropulsiontransferforwardingproptransmissibilitybroadcasttransmittabledrivestreamingtransmitpassing Back to today's word