/foh"lee oh'/ , n. , pl. folios , adj., v., folioed, folioing .
n.
1. a sheet of paper folded once to make two leaves, or four pages, of a book or manuscript.
2. a volume having pages of the largest size, formerly made from such a sheet.
3. a leaf of a manuscript or book numbered only on the front side.
4. Print.
a. (in a book) the number of each page.
b. (in a newspaper) the number of each page together with the date and the name of the newspaper.
5. Bookkeeping. a page of an account book or a left-hand page and a right-hand page facing each other and having the same serial number.
6. Law. a certain number of words, in the U.S. generally 100, taken as a unit for computing the length of a document.
adj.
7. pertaining to or having the format of a folio: a folio volume.
v.t.
8. to number each leaf or page of.
9. Law. to mark each folio in (a pleading or the like) with the proper number.
[ 1525-35; folio (orig. in phrase in folio in a leaf, sheet), abl. of folium FOLIUM ]