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A person's name, written by that person, used as identification or to signify approval of accompanying material, such as a legal contract.
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An act of signing one's name; an act of producing a signature.
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(medicine) The part of a doctor’s prescription containing directions for the patient.
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(music) Signs on the stave indicating key and tempo, composed of the key signature and the time signature.
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(printing) A group of four (or a multiple of four) sheets printed such that, when folded, they become a section of a book.
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(computing) A pattern used for matching the identity of a virus, the parameter types of a method, etc.
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(cryptography) Data attached to a message that guarantees that the message originated from its claimed source.
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(figurative) A mark or sign of implication.
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A distinguishing feature or product.
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(mathematics) A tuple specifying the sign of coefficients in any diagonal form of a quadratic form.
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(medicine, obsolete) A resemblance between the external character of a disease and those of some physical agent, for instance, that existing between the red skin of scarlet fever and a red cloth; supposed to indicate this agent in the treatment of the disease.
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(Internet) Text (or images, etc.) appended to a user's emails, newsgroup posts, forum posts, etc. as a way of adding a personal touch or including contact details.