Definitions of leaf:

• noun:   hinged or detachable flat section (as of a table or door)
• noun:   a sheet of any written or printed material (especially in a manuscript or book)
• noun:   the main organ of photosynthesis and transpiration in higher plants
• verb:   turn over pages

  Example: "Leaf through a book"

• verb:   produce leaves, of plants
• verb:   look through a book or other written material

  Example: "She leafed through the volume"

• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #10474)