plural grasses
1
a
: plants that have narrow green leaves, that are eaten by cows, sheep, horses, etc., and that are commonly grown on lawns and in gardens
a field of grass
blades/tufts of grass
It's time to mow/cut the grass. [=mow/cut the lawn]
Keep off the grass. [=don't walk on the lawn]
—often used before another noungrass clippings
grass seed
a grass hut/skirt [=a hut/skirt made from grass]
b
: a particular type of grass
ornamental grasses
wild grasses
2
slang
: marijuana
They were smoking some grass.
3
British slang
: a person who gives information to the police about the criminal activity of other people : a police informer
grasses; grassed; grassing
: to cover (an area) with grass
a large grassed area
—often + overThe land was cleared and grassed over.
Cite this Entry
“Grass.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/grass. Accessed 19 Jun. 2026.
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