- pagination, folio, page number, paging - the system of numbering pages
--1 is a kind of number
--1 is a part of page - leaf, folio - a sheet of any written or printed material (especially in a manuscript or book)
--2 is a kind of sheet, piece of paper, sheet of paper
--2 is a part of written communication, written language
--2 has particulars: flyleaf; interleaf; page - folio - 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"
--3 is a kind of book, volume