This is the 9813th most frequent Swedish word.
gräset
"Gräset" means "the grass" in English.
In this sentence, 'gräset' refers to grass as an object, specifically the grass seen outdoors. It is used as the subject of the sentence in definite form.
Gräset är grönt.
The grass is green.
Here, 'gräset' is used as a location describing where the children are playing, also in definite form representing specific grass.
Barnen leker på gräset.
The children are playing on the grass.
In this example, 'gräset' denotes the grass that was cut, acted upon directly and defined in context.