noun
1. : any of various grasses of sweet flavor or odor: as
a. : manna grass
b.
(1) : a slender fragrant perennial widely distributed holy grass ( Hierochloe odorata ) that is sometimes used in basketry — called also Seneca grass, vanilla grass
(2) : any of various other holy grasses
c. southern Africa : any of various grasses (as members of the genera Panicum and Themeda ) that are relished by stock
2. dialect England
a. : woodruff
b. : eelgrass 1
3. : sweet flag