/ Dictionary / Index J jumbo jet: Meaning and Definition of Find definitions for: jum'bo jet' Pronunciation: [key] a widebody jet airliner. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jumbojet (Thesaurus) jumbo jumbuck 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