| giant ryegrass | (n) stout perennial grass of western North America, Syn. Leymus condensatus, Elymus condensatus |
| italian ryegrass | (n) European grass much used for hay and in United States also for turf and green manure, Syn. Lolium multiflorum, Italian rye |
| perennial ryegrass | (n) European perennial grass widely cultivated for pasture and hay and as a lawn grass, Syn. English ryegrass, Lolium perenne |
| rye grass | (n) any of several annual or perennial Eurasian grasses, Syn. ryegrass |