/ Dictionary / Index P propulsion: Meaning and Definition of Find definitions for: pro•pul•sion Pronunciation: (pru-pul'shun), [key] — n. the act or process of propelling. the state of being propelled. a means of propelling; propelling force, impulse, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: propulsion (Thesaurus) proptosis prop wash Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language