/ Dictionary / Index J jack-in-the-pulpit: Meaning and Definition of Find definitions for: jack-in-the-pul•pit Pronunciation: ( jak'in-u-pool'pit, -pul'-), [key] — pl. -pul•pits. A North American plant, Arisaema triphyllum, of the arum family, having an upright spadix arched over by a green or striped purplish-brown spathe. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jack-in-the-pulpit (Thesaurus) jack-in-the-box Jack Ketch Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language