fo·lio | \ ˈfō-lē-ˌō \
plural folios

Definition of folio 

(Entry 1 of 2)

1a : a leaf especially of a manuscript or book

b : a leaf number

c : a page number

d : an identifying reference in accounting used in posting

2a : a sheet of paper folded once

b : a case or folder for loose papers

3a : the size of a piece of paper cut two from a sheet also : paper or a page of this size

b : a book printed on folio pages

c : a book of the largest size

4 : a certain number of words taken as a unit or division in a document for purposes of measurement or reference


folioed; folioing; folios

Definition of folio (Entry 2 of 2)

transitive verb

: to put a serial number on each leaf or page of

Examples of folio in a Sentence

Recent Examples on the Web: Noun

Then in 1902, the United States Geological Survey published a large folio on metropolitan New York that detailed its rocky underpinnings, including the ridge. William J. Broad, New York Times, "How the Ice Age Shaped New York," 5 June 2018 Photo: Royal Collection Trust/Her Majesty Queen Elizabeth II The manuscript is made up of 239 folios. J.s. Marcus, WSJ, "Souvenirs of a Prince’s Passage to India," 18 May 2018 Two women from Montreal donned futuristic clothes on Sunday aiming to make the folio. David Garrick,, "Costume makers converge on San Diego for convention of creativity," 14 May 2018 The story is based on the 2004 theft of Audubon folios and rare books from the Transylvania University Special Collections Library in Lexington, Ky., by four students. Pam Grady, San Francisco Chronicle, "‘American Animals’: Playing at cops and robbers," 30 May 2018 The goal is designing what people might be wearing in the future, said Sandy Pettinger, a Nebraska resident overseeing this year’s folio. David Garrick,, "Costume makers converge on San Diego for convention of creativity," 14 May 2018 Top Five Five shop owners on their top gifts for graduates, from a glass tumbler to a leather folio case. Katy Schneider, The Cut, "16 Gift Ideas for Moms, Dads, and Discerning Grads," 29 Apr. 2018 Sitting under glass was a copy of the fourth folio of Shakespeare's complete works, published in 1685 and open to the index. Debbie Arrington, sacbee, "Know your Shakespeare? Not these plays | The Sacramento Bee," 27 Apr. 2018 The company also said that a new folio case for its iPhone X will be available in the familiar red that accompanies all of its (PRODUCT)RED products. Don Reisinger, Fortune, "5 (PRODUCT)RED Devices Apple Is Selling to Help the Fight Against AIDS," 9 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'folio.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of folio


15th century, in the meaning defined at sense 1a


1858, in the meaning defined above

History and Etymology for folio


Middle English, from Latin, ablative of folium

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Time Traveler for folio

The first known use of folio was in the 15th century

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fo·lio | \ ˈfō-lē-ˌō \

Legal Definition of folio 

: a certain number of words taken as a unit or division in a document for purposes of measurement or reference

Note: A folio by statutory provision generally consists of 100 words.

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See words that rhyme with folio

Spanish Central: Translation of folio

Nglish: Translation of folio for Spanish Speakers

Comments on folio

What made you want to look up folio? Please tell us where you read or heard it (including the quote, if possible).


alleviating pain or harshness

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