- having signed, or joined in signing, a document: the signatory powers to a treaty.
noun, plural sig·na·to·ries.
- a signer, or one of the signers, of a document: France and Holland were among the signatories of the treaty.
noun plural -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
adj.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.