[ad_1] noun, plural fo·li·os.
  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. a case that, when closed, covers and protects both the screen and the back panel of a mobile device, as a tablet or smartphone.
  5. Printing.
    1. (in a book) the number of each page.
    2. (in a newspaper) the number of each page together with the date and the name of the newspaper.
  6. 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.
  7. Law. a certain number of words, in the U.S. generally 100, taken as a unit for computing the length of a document.


  1. pertaining to or having the format of a folio: a folio volume.

verb (used with object), fo·li·oed, fo·li·o·ing.

  1. to number each leaf or page of.
  2. Law. to mark each folio in (a pleading or the like) with the proper number.


  1. the back of the page; verso (opposed to folio recto).

noun plural -lios

  1. a sheet of paper folded in half to make two leaves for a book or manuscript
  2. a book or manuscript of the largest common size made up of such sheets
  3. a leaf of paper or parchment numbered on the front side only
  4. a page number in a book
  5. law a unit of measurement of the length of legal documents, determined by the number of words, generally 72 or 90 in Britain and 100 in the US
  6. NZ a collection of related material


  1. relating to or having the format of a folioa folio edition

verb -lios, -lioing or -lioed

  1. (tr) to number the leaves of (a book) consecutively

mid-15c., from Late Latin folio “leaf or sheet of paper,” from Latin folio, ablative of folium “leaf,” from PIE *bhulyom “leaf” (cf. Greek phyllon “leaf,” Gaelic bile “leaflet, blossom”), from root *bhel- (2) “to blow, inflate, swell” (see bole). Ablative of location, because this was used in page references. Meaning “volume of the largest size” first attested 1620s.

62 queries 0.573