/ Dictionary / Index J jet propulsion: Meaning and Definition of Find definitions for: jet' propul'sion Pronunciation: [key] the propulsion of a body by its reaction to a force ejecting a gas or a liquid from it. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. jet-propelled jetsam Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language