folio

n. A single leaf in a book or a manuscript. A number assigned to a leaf, typically to represent order. A book size made from sheets2 folded in half. A bill of accounts, especially for guests in a hotel. Two facing pages used to record information about a single account. LawA number of words used as a measure in legal documents; in the United States, 100 words, in England, 72 or 90 words.