the world > plants > by growth or development > defined by habit > herb or herbaceous plant > [adjective] > full of or abounding in herbaceous plants > of or relating to grass > forming characteristic vegetation (2)
(esp. of a prairie) characterized by tall grasses (A. 7c).
(a) grass grown and trimmed as a lawn; (b) used, usually attributive, to designate the vegetation of certain prairies.