Sig'na-türe, n.

noun

(53), n. [Fr. signature, It. signatura, Sp. & L. Lat. signatura, from Lat. signare, signatum. See SIGN, v. t.]

  1. A sign, stamp, or mark impressed. “The brain, being well furnished with various traces, signatures, and images.” Watts. “The natural and indelible signature of God, stamped on the human soul.” Bentley.
  2. 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; a sign-manual.
  3. (Physiol.) An outward mark by which internal characteristics were supposed to be indicated.

Some plants bear a very evident signature of their nature and use. More. 4. (Mus.) The flats or sharps at the beginning of a composition, which indicate the key or scale. Key of C. Key of G. Key of D. Key of A. Key of E. Key of F. Key of B♭. Key of E♭. Key of A♭. Signatures. 5. (Print.) One of a number of signs, or tokens, used at the bottom of certain pages of a book or pamphlet, by which the sheets are distinguished and their order designated, as a direction to the binder in arranging and folding them. Such signatures are composed of letters or figures, either singly or combined; as, A, B, C, or Aa, Bb, or 3 A, 3 B, or 1, 1, 2, 2, and the like.

Three grand staves show the key signatures for G, E, and E-flat.
Signatures.
Three pairs of treble and bass staves show the key signatures for D, F, and A-flat.
Three grand staves show the key signatures for C, A, and B-flat.