1 having signed or joined in signing a document 2 a signer, or one of the signers, of a document
The signatories of an official document are the people, organizations, or countries that have signed it. Both countries are signatories to the Nuclear Non-Proliferation Treaty. signatories one of the people, organizations, or countries that signs an official agreement signatory to/of
1 having signed or joined in signing a document 2 a signer, or one of the signers, of a document (The Random House Dictionary)