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[sig-nuh-tawr-ee, -tohr-ee] /ˈsɪg nəˌtɔr i, -ˌtoʊr i/
having signed, or joined in signing, a document:
the signatory powers to a treaty.
noun, plural signatories.
a signer, or one of the signers, of a document:
France and Holland were among the signatories of the treaty.
Origin of signatory
1640-50, in earlier sense “used in affixing seals”; 1860-65 for def 2; < Latin signātōrius of, belonging to sealing, equivalent to signā(re) to mark, seal (see sign) + -tōrius -tory1
Related forms
nonsignatory, adjective, noun, plural nonsignatories. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Historical Examples
  • Further, this declaration was not to be binding in case of a war in which a non-signatory was or became a belligerent.

British Dictionary definitions for non-signatory


/ˈsɪɡnətərɪ; -trɪ/
noun (pl) -ries
a person who has signed a document such as a treaty or contract or an organization, state, etc, on whose behalf such a document has been signed
having signed a document, treaty, etc
Word Origin
C17: from Latin signātōrius concerning sealing, from signāre to seal, from signum a mark
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for non-signatory



1640s, "used in sealing," from Latin signatorius "of sealing," from signatus, past participle of signare "to sign" (see sign (v.)). Noun sense of "one who signs" (a treaty, etc.) first recorded 1866.

Online Etymology Dictionary, © 2010 Douglas Harper
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