/ Dictionary / Index R roux: Meaning and Definition of Find definitions for: roux Pronunciation: (r), [key] — n. a cooked mixture of butter or other fat and flour used to thicken sauces, soups, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: roux (Thesaurus) routinize Rouyn Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language