signature

noun

• 1a person’s name written in a distinctive way as a form of identification in authorizing a cheque or document or concluding a letter: the signature of a senior manager
• [mass noun] the action of signing a document:the licence was sent to the customer for signature
• a distinctive pattern, product, or characteristic by which someone or something can be identified:the chef produced the pâté that was his signature [as modifier]:his signature dish

• 2 Musicshort for key signature or time signature.

• 3 Printing a letter or figure printed at the foot of one or more pages of each sheet of a book as a guide in binding.
• a printed sheet after being folded to form a group of pages.

• 4North American the part of a medical prescription that gives instructions about the use of the medicine or drug prescribed.