folio

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folio

  • /ˈfəʊlɪəʊ/ UK
  • /ˈfəʊljəʊ/ UK
  • /ˈfoʊliˌoʊ/ Canada, US
  • /ˈfəʉliˌəʉ/ Australia
  • /ˈfɐʉliˌɐʉ/ New Zealand

Rhymes with -əʊljəʊ

Where it comes from

From Middle English folio (“leaf of a book”), borrowed from Medieval Latin foliō, Late Latin foliō, Latin foliō, the ablative singular form of Late Latin folium (“leaf or sheet of paper”), Latin folium (“leaf of a plant”), ultimately from Proto-Indo-European *bʰleh₃- (“bloom, flower”). Doublet of foil and folium, and distantly related to phyllo and phyllon.

Senses 1, 2, 3.1, 5, and 6 relating to a leaf or page are derived from Medieval Latin foliō in references; sense 5 (“page in an account book”) may be derived from Italian foglio (“rectangular sheet of paper”), from Latin folium. Senses 3.2 and 3.3 relating to a paper size are from Italian in foglio or its etymon Latin in foliō.

noun folios

  1. A leaf of a book or manuscript. [Thomas] Hood also presented his treatises in such a way that conveniently accessing specific lessons was difficult, if not impossible, for the reader-practitioner. For example, his book entitled The Vse of Both the Globes, Celestiall and Terrestriall... (1592) was roughly two hundred pages long but
  2. A page of a book, that is, one side of a leaf of a book. Folio Page.—A page which occupies the half of a full sheet of paper, as Post-folio, Demy-folio, etc. Two pages of folio are imposed together as one form, four pages being a perfect sheet. Post-folio and Foolscap-folio, however, are more frequently imposed as four-page forms, and printed on Double-po
  3. broadly A page number. The even folios are on the left-hand pages and the odd folios on the right-hand pages. Folio.—The running number of the pages of a work. When there is no running title, the folio is placed in the centre of the head-line; when there is a running title, at the outside corner—the even folio on the left, the odd on the right. The preface, contents, index, and all introductory matter, usua
  4. broadly A sheet of paper folded in half. This pocket copying-machine, by which letters and writings of all sizes, even folio, may be very quickly copied, consists of a press four inches long, with a small cylinder, which contains pens and ink: the whole apparatus may be conveniently carried in the pocket, and the price is very moderate.
  5. broadly A book made of sheets of paper each folded in half (two leaves or four pages to the sheet); hence, a book of the largest kind, exceeding 30 centimetres in height. A rare copy of Shakespeare’s First Folio.

    Similar: F, f, fo, 2º

  6. A wrapper for loose papers.
  7. A page in an account book; sometimes, two opposite pages bearing the same serial number. In the leger,^([sic]) articles of the ſame kind are collected together; and, for that purpoſe, it is divided into many accounts, under which the different branches of buſineſs are arranged. Each account is introduced by a proper title, to explain the nature of the articles it contains; and articles
  8. A protective case with a flap that folds to cover the screen of a mobile device.
  9. dated A leaf containing a certain number of words; hence, a certain number of words in a piece of writing, as in England, in law proceedings 72, and in chancery, 90; in New York, 100 words. [page 172] When actions are brought in the Courts of King's Bench or Common Pleas, founded upon original writs issuing out of the Courts of Chancery (which writs, as stated in the Report of the 9th of April 1816, it is the duty of the Cursitors to make out) it has been the practice in certain cases

verb folios · folioing · folioed

  1. transitive To put a serial number on (a folio or page, or on all the folios or pages of a book); to foliate, to page. And all the pleadings and other proceedings and copies thereof shall be fairly and legibly written; and if not so written, and folioed, and indorsed as aforesaid, the clerks shall not file such as may be offered to them for that purpose, nor will the court hear any motion or application founded ther

Thesaurus

Closest in meaning: pagination, leaf, page number, page, manuscript, piece, landscape, chang, sheet, slip, slips, jang, document, paper, codex, volume

Translations

Every language

noun page number

Françaisfolio

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Cite this
MLA

"folio." Wiktionary, via Micwyn, micwyn.com/word/folio. Accessed 6 Nov. 2026.

APA

folio. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/folio

Chicago

"folio." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/folio.

BibTeX
@misc{folio_2026,
  title = {folio},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/folio},
  urldate = {2026-11-06}
}