ryegrass

UK: /ˈraɪgrɑːs/ US: (rī′gras′, -gräs′)

WordReference Random House Unabridged Dictionary of American English © 2026

rye•grass  (rī′gras′, -gräs′), n. 

1. Plant Biology any of several European grasses of the genus Lolium, as L. perenne (perennial ryegrass), grown for forage in the U.S.

• rye¹ + grass 1740–50

Collins Concise English Dictionary © HarperCollins Publishers::

rye-grass noun

1. any of various grasses of the genus Lolium, esp L. perenne, native to Europe, N Africa, and Asia and widely cultivated as forage crops. They have a flattened flower spike and hairless leaves