/ Dictionary / Index I impeller: Meaning and Definition of Find definitions for: im•pel•ler Pronunciation: (im-pel'ur), [key] — n. a person or thing that impels. a rotor for transmitting motion, as in a centrifugal pump, blower, turbine, or fluid coupling. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: impeller (Thesaurus) impellent impend Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language