signatory
noun
sig·na·to·ry ˈsig-nə-ˌtȯr-ē 
plural signatories
: a signer with another or others
signatories to a petition
especially : a government bound with others by a signed convention
signatory adjective
Did you know?
A signatory puts his or her signature on a document that is also signed by others. In 1215 the English barons revolted against King John and forced him to join them as a signatory to the Magna Carta. This agreement stated the barons' own duties to the King but also assigned the barons clear rights and limited the King's power over them. Though the Magna Carta did nothing for the common people, it's often been called the first step toward democracy in the English-speaking countries.
Example Sentences
a signatory of the Declaration of Independence
Recent Examples on the Web Peru is a signatory of a regional human rights convention and bound to the court. 
New York Times, 17 Mar. 2022 Portugal, Korea, Russia, Spain and U.K. Australia currently has treaties with Canada, China, Germany, Ireland, Israel, Italy, Korea, Malaysia, Singapore and South Africa and is a signatory to MOUs with France and New Zealand. Naman Ramachandran, Variety, 11 Aug. 2022 Richard Neher, an associate professor of viral evolution at the University of Basel in Switzerland, was a signatory to the article. Helen Branswell, STAT, 2 Aug. 2022 On the left, the most notable signatory was Gabriel Boric. Jon Lee Anderson, The New Yorker, 6 June 2022 DiPalma said that in this case, the governor’s office was the signatory rather than the state education department. Globe Staff, BostonGlobe.com, 13 May 2022 The bill also requires that a state agency serve as the signatory on contracts resulting from requests for proposals. Globe Staff, BostonGlobe.com, 13 May 2022 While Britt claimed to be the first candidate in the Senate race to sign the pledge, Brooks is listed as a signatory of the no-tax pledge in the 112th Congress, which convened from 2011 to 2013. Paul Gattis | Pgattis@al.com, al, 26 Mar. 2022 The Declaration will also be officially launched at COP26, with Intrepid Travel serving as a signatory. Robert Reiss, Forbes, 4 Nov. 2021 See More
New York Times, 17 Mar. 2022 Portugal, Korea, Russia, Spain and U.K. Australia currently has treaties with Canada, China, Germany, Ireland, Israel, Italy, Korea, Malaysia, Singapore and South Africa and is a signatory to MOUs with France and New Zealand. Naman Ramachandran, Variety, 11 Aug. 2022 Richard Neher, an associate professor of viral evolution at the University of Basel in Switzerland, was a signatory to the article. Helen Branswell, STAT, 2 Aug. 2022 On the left, the most notable signatory was Gabriel Boric. Jon Lee Anderson, The New Yorker, 6 June 2022 DiPalma said that in this case, the governor’s office was the signatory rather than the state education department. Globe Staff, BostonGlobe.com, 13 May 2022 The bill also requires that a state agency serve as the signatory on contracts resulting from requests for proposals. Globe Staff, BostonGlobe.com, 13 May 2022 While Britt claimed to be the first candidate in the Senate race to sign the pledge, Brooks is listed as a signatory of the no-tax pledge in the 112th Congress, which convened from 2011 to 2013. Paul Gattis | Pgattis@al.com, al, 26 Mar. 2022 The Declaration will also be officially launched at COP26, with Intrepid Travel serving as a signatory. Robert Reiss, Forbes, 4 Nov. 2021 See More Word History
Etymology
Latin signatorius of sealing, from signare
First Known Use
1826, in the meaning defined above
Legal Definition
signatory
noun
sig·na·to·ry ˈsig-nə-ˌtōr-ē
plural signatories
: a signer with another or others
signatories to a petition
especially : a government bound with others by a signed convention