Definition of: leaf

(lēf) noun plural leaves (lēvz)
1. A lateral photosynthetic appendage of the stem of a plant, commonly broad, flat, thin, and of a green color. ♦ Collateral adjective: foliar.
2. Foliage collectively; leafage; specifically, the leaves of the tobacco or the tea plant when gathered for curing or sale.
3. A single division of a folded sheet of paper or the like, as in a book, or a single unfolded piece; also, what is written or printed on a leaf.
4. A hinged, folding, sliding, or removable part or section, as of a table, door, gate, screen, or folding fan.
5. A very thin sheet or plate of metal, as gold; also, one of marble, horn, etc.
6. A layer or fold of fat, especially over the kidneys of a hog.
7. One of the thin, flat strips of metal composing a spring of an automobile.
8. A petal: incorrect, but popularly used.
—to turn over a new leaf To change one's ways or conduct, especially for the better.
—adjective Of, pertaining to, suggestive of, or occurring in, a leaf or leaves.
—v.i. To put forth or produce leaves.
—v.t. To turn or run through the pages of a book: often with through. ♦ Homophone: lief. [OE lēaf]
TYPES OF TREE LEAVES