A folio is an old fashioned kind of book, typically made of large folded sheets of paper. In the 1600s, many of Shakespeare's plays were printed in the form of a folio.

The word folio means "leaf or sheet of paper" in Latin. A folio is made by folding one piece of paper in half — counting each side, this gives you four pages. A larger folio is simply a collection of many folded sheets bound together. In the early days of printing, the fanciest books were folios. Another method was the quarto, with two folds in each sheet and pages that had to be cut open after they were bound.

Primary Meanings of folio

a book (or manuscript) consisting of large sheets of paper folded in the middle to make two leaves or four pages
the system of numbering pages
Full Definitions of folio

n a book (or manuscript) consisting of large sheets of paper folded in the middle to make two leaves or four pages

“the first folio of Shakespeare's plays”
Type of:
book, volume
physical objects consisting of a number of pages bound together

n a sheet of any written or printed material (especially in a manuscript or book)

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a blank leaf in the front or back of a book
a blank leaf inserted between the leaves of a book
one side of one leaf (of a book or magazine or newspaper or letter etc.) or the written or pictorial matter it contains
full page
something that covers an entire page
half page
something that covers (the top or bottom) half of a page
right-hand page
left-hand page
title page
a page of a book displaying the title and author and publisher
bastard title, half title
a first page of some books displaying only the title of the book
sports page
any page in the sports section of a newspaper
facing pages, spread, spread head, spreadhead
two facing pages of a book or other publication
foldout, gatefold
an oversize page that is folded in to a book or magazine
Type of:
piece of paper, sheet, sheet of paper
paper used for writing or printing

n the system of numbering pages

page number, pagination, paging
Type of:
a concept of quantity involving zero and units

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