Grass: A space of sound created by multiple living forms of earth that have risen from soil in long thin columns drawn up by the sun. When  these columns grow heavy with seed and their hollow stalks dry, they sound when a human walks through them. This sound is “grass”, which is repeated with each stride. A space that has entered the particular form of lifting by the sun that draws forth this effect from the earth is named grass — not the stalks themselves; they are known as “stalks of grass”, which is to say, “stalks of sound”.

The grass is growing on the hill.

Giant Rye Grass in The Snow, Okanagan Valley, Canada