any of a genus (Lolium) of annual or short-lived perennial grasses, often grown for lawns or as forage
or rye grass
Any of several grasses of the genus Lolium, native to Eurasia and often used for forage or for stabilizing soil.
Origin of ryegrassAlteration of raygrass : ray, darnel (from Middle English rai, perhaps alteration of Old French ivraie, from Latin &emacron;briaca, from feminine of &emacron;briacus, drunk (from the plant's effects if ingested), from &emacron;brius; see inebriate) + grass.
(countable and uncountable, plural ryegrasses)