/ Dictionary / Index J jump-off: Meaning and Definition of Find definitions for: jump-off Pronunciation: ( jump'ôf", -of"), [key] — n. a place for jumping off. a point of departure, as of a race or a military attack. the start of such a departure. a supplementary contest among horses tied for first place in a jumping contest. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jump-off (Thesaurus) jumpmaster jump pass Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language