noun
grass
grahs
noun
1
A common green plant with narrow leaves that covers lawns, fields, and meadows.
"The kids ran barefoot through the grass."
"He mowed the grass every Saturday morning."
2
Marijuana (informal).
"The smell of grass drifted from the concert crowd."
3
British informal: an informer who reports criminals or wrongdoers to the authorities.
"Nobody trusted him after he turned out to be a grass."
verb
1
British informal: to inform on someone to the police or another authority.
"He grassed on his old gang to avoid a longer sentence."
How to Use Grass
Learner’s notesIn plain EnglishThe green plant covering lawns and fields; also slang for marijuana or, in British English, for a police informer.
When to use it
The informer and marijuana senses are informal/slang; the plant sense is the neutral everyday meaning.
Common pairings
cut the grass
touch grass
grass on someone
Word Forms
grassed past tense, grasses plural, grasses singular
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Etymology
From Old English græs, an ancient word going back to a root meaning "to grow" — related to "green" and "grow".