General English


  • noun a structure growing from a plant stem, with a stalk and a flat blade. It is usually green and carries out photosynthesis.
  • noun
    (written as LEAF)
    an independent organisation that promotes better understanding of farming by the public and helps farmers improve the environment by combining the best traditional farming methods with modern technology.
  • acronym forLinking Environment and Farming
    (written as LEAF)


  • In a hierarchical structure, such as a tree, a node which has no descendants. In a hierarchical file system, for example, a file is a leaf. Also called leaf node, or terminal node.
  • A very thin sheet of metal. A leaf is thinner than a foil. A gold leaf may have a thickness of about 100 nanometers.

Information & Library Science

  • noun a page of a book printed on both sides

Real Estate

  • noun a hinged or sliding section of a door, shutter or gate


  • noun marihuana. A predictable nickname for herbal cannabis.


  • While leaves are needed for photosynthesis to occur, which provides some of the energy for a plant, if a vine produces too many leaves, it could produce too little fruit; leaf, or canopy, control is therefore important in viticulture. The leaves can also shade the grape berries from the sun, which would prevent them ripening well, and the different vine training and canopy management techniques are designed to avoid this.

Origin & History of “leaf”

Leaf goes back to a prehistoric Germanic *laubaz, which also produced words for ‘foliage’ in other modern Germanic languages (German laub, Dutch loof, Swedish löf, and Danish løv). It is not known for certain where the Germanic word came from, although a connection has been suggested with Russian lupit’ ‘bark’. It may also lie behind the modern English words lobby and lodge.