From Longman Dictionary of Contemporary Englishgrass something ↔ over phrasal verbDLGto cover land with grass → grass→ See Verb table
Examples from the Corpus
grass over• Many a song stood still in the long grass.• The Great Plains, extending to the Texas coast, have traditionally been a mighty sea of grass.• The parka in reverse from rose pink to a grass green print over a siren gown, by Ungaro. 5.• Q.. Can I plant grass in earth over an asphalt driveway?• It was almost as if he needed grass all over his sweaty face before he could play in the outfield.• Several hundred acres of rustling, wind-blown grass swept over our feet and under scattered oak trees.• The tall grass flowed over the hills.• The flood escaped, and more surged in, water over grass, grass over water. 