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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.
Examples of signatory in a Sentence
a signatory of the Declaration of Independence
Recent Examples on the Web
Barrett was the bank signatory, however.
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Miami Herald, 7 Nov. 2025
Neither Russia nor the US have tested nuclear weapons since the 1990s, and are both signatories of the CTBT, which bans all nuclear test explosions, no matter their purpose.
—Darya Tarasova, CNN Money, 5 Nov. 2025
Whether the boycott signatories are on that list is unclear.
—Tatiana Siegel, Variety, 4 Nov. 2025
Once seated, she is expected to become the 218th signatory on the discharge petition, giving the coalition enough support to force Johnson’s hand.
—Robert Alexander, MSNBC Newsweek, 31 Oct. 2025
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Miami Herald, 7 Nov. 2025
Neither Russia nor the US have tested nuclear weapons since the 1990s, and are both signatories of the CTBT, which bans all nuclear test explosions, no matter their purpose.
—Darya Tarasova, CNN Money, 5 Nov. 2025
Whether the boycott signatories are on that list is unclear.
—Tatiana Siegel, Variety, 4 Nov. 2025
Once seated, she is expected to become the 218th signatory on the discharge petition, giving the coalition enough support to force Johnson’s hand.
—Robert Alexander, MSNBC Newsweek, 31 Oct. 2025
See All Example Sentences for signatory
Cite this Entry
“Signatory.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/signatory. Accessed 14 Nov. 2025.
Copy CitationLegal 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
signatory
adjective
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