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Definition of folio

folio

/ˈfoʊ.liˌoʊ/
fo · li · o

Plural:folios
•
Past Simple:folioed
•
Past Participle:folioed
•
Present Participle:folioing
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folio Lexical Profile

folio Game Scores & Validity

• noun

1

A book or manuscript of the largest common size, made up of sheets of paper folded once to create two leaves or four pages.

Example

"The library's rare book room houses a beautifully preserved first folio of Shakespeare's plays."


2

An individual leaf of paper or parchment in a manuscript or book, typically numbered only on the front side (the recto).

Example

"The scholar carefully turned to folio 42 to examine the intricate medieval illuminations."


3

A page number in a printed book, often including the running head.

Example

"The designer adjusted the placement of the folio to ensure it aligned perfectly with the bottom margin."

Synonyms
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• adjective

1

Formed of sheets folded once, creating two leaves or four pages, typically resulting in a very large format.

Example

"She purchased a rare folio edition of the anatomical atlas to aid in her medical research."

• verb

1

To paginate or number the consecutive leaves of a book or manuscript.

Example

"The archivist spent the afternoon folioing the newly acquired collection of medieval letters."

Synonyms
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• Rhymes for folio

Word Origin & Etymology

From the Latin 'folium' meaning 'leaf'. Originally used in the Latin phrase 'in folio', meaning 'in the form of a folded leaf', which came to designate books of the largest common size.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Folio. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/folio
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