/ Dictionary / Index J jounce: Meaning and Definition of Find definitions for: jounce Pronunciation: ( jouns), [key] — v., n. jounced, jounc•ing, —v.t., v.i. to move joltingly or roughly up and down; bounce. —n. a jouncing movement. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jounce (Thesaurus) Joule-Thomson effect jour. Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language