/ Dictionary / Index J jetsam: Meaning and Definition of Find definitions for: jet•sam Pronunciation: ( jet'sum), [key] — n. goods cast overboard deliberately, as to lighten a vessel or improve its stability in an emergency, which sink where jettisoned or are washed ashore. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jetsam (Thesaurus) jet propulsion jet set 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