Quick definitions from WordNet (folio)
▸ noun: a book (or manuscript) consisting of large sheets of paper folded in the middle to make two leaves or four pages ("The first folio of Shakespeare's plays")
▸ noun: a sheet of any written or printed material (especially in a manuscript or book)
▸ noun: the system of numbering pages
▸ name: A surname (very rare: popularity rank in the U.S.: #57262)
▸ Also see folio
▸ noun: a book (or manuscript) consisting of large sheets of paper folded in the middle to make two leaves or four pages ("The first folio of Shakespeare's plays")
▸ noun: a sheet of any written or printed material (especially in a manuscript or book)
▸ noun: the system of numbering pages
▸ name: A surname (very rare: popularity rank in the U.S.: #57262)
▸ Also see folio