Signatures

noun

1. A person's name, written by that person, used as identification or to signify approval of accompanying material, such as a legal contract.
2. An act of signing one's name; an act of producing a signature.
3. The part of a doctor’s prescription containing directions for the patient.
4. Signs on the stave indicating key and tempo, composed of the key signature and the time signature.
5. A group of four (or a multiple of four) sheets printed such that, when folded, they become a section of a book.