<p><strong>Adjective</strong></p><ul><li>Having signed, or joined in signing, a document: the signatory powers to a treaty.</li></ul><p><strong>Noun</strong></p><ul><li>Signatory, plural: signatories.</li><li>A signer, or one of the signers, of a document: France and Holland were among the signatories of the treaty.</li></ul>