From WordNet (r) 3.0 (2006):
leaf
n 1: the main organ of photosynthesis and transpiration in
higher plants [syn: leaf, leafage, foliage]
2: a sheet of any written or printed material (especially in a
manuscript or book) [syn: leaf, folio]
3: hinged or detachable flat section (as of a table or door)
v 1: look through a book or other written material; "He thumbed
through the report"; "She leafed through the volume" [syn:
flick, flip, thumb, riffle, leaf, riff]
2: turn over pages; "leaf through a book"; "leaf a manuscript"
3: produce leaves, of plants