folio has definitions from the fields of printing,mathematics,writing
1
[ noun ] (mathematics) the system of numbering pages

Related terms

number page

2
[ noun ] (writing) a book (or manuscript) consisting of large sheets of paper folded in the middle to make two leaves or four pages

Examples

"the first folio of Shakespeare's plays"

Related terms

book

3
[ noun ] (printing) a sheet of any written or printed material (especially in a manuscript or book)

Synonyms

leaf

*