/ Dictionary / Index J jack rabbit: Meaning and Definition of Find definitions for: jack' rab"bit Pronunciation: [key] any of various large hares of western North America, having very long hind legs and long ears. jack•rab•bit Pronunciation: ( jak'rab"it), [key] — adj. resembling a jack rabbit, as in suddenness or rapidity of movement: The car made a jackrabbit start when the traffic light turned green. —v.i. to go or start forward with a rapid, sudden movement. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jackrabbit (Thesaurus) jackpot jack rafter Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language