2 definitions found From WordNet (r) 2.0 [wn]: propeller noun: a mechanical device that rotates to push against air or water [syn: {propellor}] From The Collaborative International Dictionary of English v.0.44 [gcide]: Propeller \Pro*pel"ler\, noun 1. One who, or that which, propels. 2. A contrivance for propelling a steam vessel, usually consisting of a screw placed in the stern under water, and made to revolve by an engine; a propeller wheel. 3. A steamboat thus propelled; a screw steamer. {Propeller wheel},the screw, usually having two or more blades, used in propelling a vessel.

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