from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Having a signature affixed.
  • adjective Of, relating to, or expressed in a sign language.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective mathematics, computer science Having both positive and negative varieties.
  • adjective Having a signature, endorsed.
  • verb Simple past tense and past participle of sign.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective having a handwritten signature
  • adjective used of the language of the deaf


Sorry, no etymologies found.


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  • In book publishing, describes a book that the author has autographed; compare to inscribed.

    February 25, 2008