/ Dictionary / Index R ryegrass: Meaning and Definition of Find definitions for: rye•grass Pronunciation: (rī'gras", -gräs"), [key] — n. any of several European grasses of the genus Lolium, as L. perennegrown for forage in the U.S. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ryegrass (Thesaurus) rye bread Ryeland Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language