Leaf

1. A usually green, flattened, lateral structure attached to a stem and functioning as a principal organ of photosynthesis and transpiration in most plants.
2. The state or time of having or showing leaves. The trees were in full leaf.
3. Any of the sheets of paper bound in a book, each side of which constitutes a page. She leafed through the new catalog.
4. A hinged or removable section for a table top. When we have guests, we add a leaf to the table.