/ Dictionary / Index J jump jet: Meaning and Definition of Find definitions for: jump' jet" Pronunciation: [key] a jet airplane capable of taking off and landing vertically or on an extremely short runway or flight deck. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. jumping spider jump line Related Content Daily Word Quiz: longevity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language