signature

1. General: Personal name written in one's hand, with the intention of accepting, authenticating, and/or executing a document. In some instances, a mark, seal, stamp, or symbol may also be considered a signature.

2. Advertising: (1) Name of the advertiser as it appears (usually) in the bottom part of an ad, (2) Song or music piece associated with a commercial or radio or television program. Also called theme song.

3. Emails: Lines of text that identify the sender.

4. Printing: Sheet of printed paper that is folded one or more times to become a single unit of several pages in multiples of 4, such as an 8-page, 12-page, 16-page signature. Signatures are collected in their proper sequence (called 'gathering'), bound or sewn, and trimmed to produce the finished publication. Its name comes from the old practice of placing a mark on the first (top) page to guide the gatherer.