signature

Length / number of characters: 9
Number of words: 1

the sharps or flats that follow the clef and indicate the key
your name written in your own handwriting
a distinguishing style
a melody used to identify a performer or a dance band or radio/tv program
a sheet with several pages printed on it
A sign, stamp, or mark impressed, as by a seal
Especially, the name of any person, written with his own hand, employed to signify that the writing which precedes accords with his wishes or intentions
An outward mark by which internal characteristics were supposed to be indicated
A resemblance between the external characters of a disease and those of some physical agent, for instance, that existing between the red skin of scarlet fever and a red cloth
The designation of the key (when not C major, or its relative, A minor) by means of one or more sharps or flats at the beginning of the staff, immediately after the clef, affecting all notes of the same letter throughout the piece or movement. Each minor key has the same signature as its relative major
A letter or figure placed at the bottom of the first page of each sheet of a book or pamphlet, as a direction to the binder in arranging and folding the sheets
The printed sheet so marked, or the form from which it is printed
That part of a prescription which contains the directions to the patient. It is usually prefaced by S or Sig. (an abbreviation for the Latin signa, imperative of signare to sign or mark)
To mark with, or as with, a signature or signatures

You can also check definition for signature on wikipedia or google (link opens in new window)