n. ~ 1. A single leaf in a book or a manuscript. - 2. A number assigned to a leaf, typically to represent order. - 3. A book size made from sheets2 folded in half. - 4. A bill of accounts, especially for guests in a hotel. - 5. Accounting · Two facing pages used to record information about a single account. - 6. Law (archaic) · A number of words used as a measure in legal documents; in the United States, 100 words, in England, 72 or 90 words.