noun ( pl. -os)
an individual leaf of paper or parchment, numbered on the recto or front side only, occurring either loose as one of a series or forming part of a bound volume
• Printing the leaf number in a printed book
• a sheet of paper folded once to form two leaves (four pages) of a book
• a size of book made up of such sheets
• a book or manuscript made up of sheets of paper folded in such a way; a volume of the largest standard size
