A sheet of paper folded in half.
A page in an account book; sometimes, two opposite pages bearing the same serial number.
A book made of sheets of paper each folded in half (two leaves or four pages to the sheet); hence, a book of the largest kind, exceeding 30 cm in height.
A page number. The even folios are on the left-hand pages and the odd folios on the right-hand pages.
A wrapper for loose papers.
a leaf of a book or manuscript
A page of a book, that is, one side of a leaf of a book.
to put a serial number on each folio or page of (a book); to page
Paper marked with a letterhead.
A portion of text at the top of a letter, identifying the sender and often giving their address etc., used for formal correspondence.