Etymology: ablative, Ablative of w:Latin, Latin folium, meaning rewritten story. See foil.
- A leaf of a book or manuscript.
- A sheet of paper once folded.
- A book made of sheets of paper each folded once (four pages to the sheet); hence, a book of the largest kind.
- (printing, Printing) The page number. The even folios are on the left-hand pages and the odd folios on the right-hand.
- A page of a book; (bookkeeping, Bookkeeping) a page in an account book; sometimes, two opposite pages bearing the same serial number.
- (law, Law) 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. Folio post, a flat writing paper, usually 17 by 24 inches.
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Full Definition of folio