/ Dictionary / Index J je ne sais quoi*: Meaning and Definition of Find definitions for: je ne sais quoi Pronunciation: (zhun se kwa'), [key] — French. French. an indefinable, elusive quality, esp. a pleasing one:je ne sais quoi that charms everybody. She has a certain Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Jena Jenghis Khan Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language