1. green vegetables, especially leafy vegetables such as lettuce, spinach, or cabbage
Usage: often used in plural or as a mass noun; chiefly British
2. grass, plants, or vegetation in general
Usage: informal

Examples

• The market had plenty of fresh greenstuff available this morning.
• She added some greenstuff to her salad for extra nutrition.
• The garden was full of greenstuff after the spring rains.
• Doctors recommend eating more greenstuff as part of a healthy diet.
• The farmer harvested the greenstuff before the first frost.