/ Dictionary / Index P propeller: Meaning and Definition of Find definitions for: pro•pel•ler Pronunciation: (pru-pel'ur), [key] — n. a device having a revolving hub with radiating blades, for propelling an airplane, ship, etc. a person or thing that propels. the bladed rotor of a pump that drives the fluid axially. a wind-driven, usually three-bladed, device that provides mechanical energy, as for driving an electric alternator in wind plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: propeller (Thesaurus) propellent propeller horsepower Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language