Longman Dictionary of Contemporary English - grass

~1 n 1 »IN FIELDS« a) a very common plant with thin green leaves that grows in fields and is often eaten by animals  (a blade of grass | Please keep off the grass.) b) a particular kind of grass  (sea grasses) 2 »DRUG« slang marijuana 3 »CRIMINAL« BrE informal someone, usually a criminal, who gives information about other criminals to the police; informer; stoolpigeon AmE  (- see also supergrass) 4 not let the grass grow under your feet to not waste time or delay starting something 5 put sb out to grass informal to make someone leave their job because they are too old to do it effectively  (an old judge being put out to grass)  (- see also grass roots, snake in the grass snake1 (3)) ~2 v BrE informal if a criminal grasses on other criminals, he tells the police about their activities + on  (That bastard must have grassed on us!) grass sb up BrE  (I wonder who grassed us up?) grass sth over phr v to cover land with grass