Leaf is the main organ of photosynthesis and transpiration in higher plants, typically consisting of a flat green blade attached to a stem.
The term "leaf" also refers to:
1. A sheet of paper in a book
2. The hinged part of a table that can be raised or lowered
3. A very thin layer of metal (e.g. gold leaf)
4. In botany, the foliage of a plant collectively
5. Slang for marijuana