1. past tense of grass; covered with grass or planted grass on an area
2. informed on someone to authorities
Usage: British slang

Examples

• The construction crew grassed the new park last spring.
• They grassed over the muddy area behind the house.
• The lawn was recently grassed and needs time to grow.
• He grassed on his accomplices to reduce his sentence.
• She was angry that someone had grassed her to the police.
• The hillside was grassed to prevent erosion.