/ Dictionary / Index L lyonnaise: Meaning and Definition of Find definitions for: ly•on•naise Pronunciation: (lī"u-nāz' Fr. lē-ô-nez'), [key] — adj. (of food, esp. fried potatoes) cooked with pieces of onion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lyonnaise (Thesaurus) Lyonnais Lyonnesse Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language