Folio definition

fōlē-ō
The definition of a folio is a large sheet of paper folded in the middle, or a large book containing sheets of paper.

A folder which can protect papers inside is an example of a folio.

A piece of paper folded over and forming four pages in a book is an example of a folio.

noun
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A leaf of a book numbered only on the front side.
noun
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(paper) A sheet of paper once folded.
noun
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To number the pages of (a book, etc.) consecutively; page.
verb
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A page number.
noun
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(law) A specific number of words used as a unit for measuring the length of the text of a legal document.
noun
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A large sheet of paper folded once in the middle, making two leaves or four pages of a book or manuscript.
noun
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A number on such a leaf.
noun
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A large sheet of paper folded once, so that it forms two leaves, or four pages, of a book, manuscript, etc.
noun
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A large size of book, about 12 by 15 inches, made of sheets folded in this way.
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A leaf of a manuscript, book, etc. numbered on only one side.
noun
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The number of a page in a book, etc.
noun
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A leaf of a book or manuscript.
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(books) A book made of sheets of paper each folded once (two leaves or four pages to the sheet); hence, a book of the largest kind, exceeding 30 cm in height.
noun
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(printing) The page number. The even folios are on the left-hand pages and the odd folios on the right-hand.
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A page of a book.
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(accounting) A page in an account book; sometimes, two opposite pages bearing the same serial number.
noun
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(law, dated, 19th century, early, 20th century) A leaf containing a certain number of words, hence, a certain number of words in a writing, as in England, in law proceedings 72, and in chancery, 90; in New York, 100 words.
noun
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To put a serial number on each folio or page of (a book); to page.
verb
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A book or manuscript of the largest common size, usually about 38 centimeters (15 inches) in height, consisting of such folded sheets.
noun
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To number consecutively the pages or leaves of (a book, for example).
verb
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(bookkeeping) A page of a ledger, or facing pages with the same number.
noun
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(law) A set number of words (100 in the U.S., 72 or 90 in England) considered as a unit of measuring the length of a legal or official document.
noun
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Having sheets folded once; of the size of a folio.
adjective
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in folio
  • in the form or size of a folio
idiom
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Other Word Forms

Noun

Singular:
folio
Plural:
folios

Idioms and Phrasal Verbs

in folio

Origin of folio

  • Middle English from Late Latin foliō ablative of folium leaf of paper from Latin leaf bhel-3 in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin ablative singular form of folium (“leaf”)

    From Wiktionary