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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
The grassroots movement behind EU–INC has garnered over 18,000 signatories and support from Europe’s most successful entrepreneurs and investors, including leaders from Mistral, DeepMind, Stripe, Supercell, Index Ventures and Y Combinator.
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Jan Hammer, Fortune, 18 Oct. 2025
The furore over the doc extended to some of the industry’s top creatives, with soccer star Gary Lineker, actors Riz Ahmed, Khalid Abdalla, and Miriam Margolyes, and director Mike Leigh among the hundreds of signatories of an open letter calling for the BBC to reinstate the program on iPlayer.
—Lily Ford, HollywoodReporter, 17 Oct. 2025
Today, the Artemis Accords’ 56 signatory nations share a vision for peaceful, sustainable and transparent cooperation in space.
—Kit Bernardi, USA Today, 14 Oct. 2025
The photo of the document was obtained by The Associated Press and its veracity was confirmed by two officials, including one whose country was a signatory.
—Arkansas Online, 12 Oct. 2025
See All Example Sentences for signatory
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Jan Hammer, Fortune, 18 Oct. 2025
The furore over the doc extended to some of the industry’s top creatives, with soccer star Gary Lineker, actors Riz Ahmed, Khalid Abdalla, and Miriam Margolyes, and director Mike Leigh among the hundreds of signatories of an open letter calling for the BBC to reinstate the program on iPlayer.
—Lily Ford, HollywoodReporter, 17 Oct. 2025
Today, the Artemis Accords’ 56 signatory nations share a vision for peaceful, sustainable and transparent cooperation in space.
—Kit Bernardi, USA Today, 14 Oct. 2025
The photo of the document was obtained by The Associated Press and its veracity was confirmed by two officials, including one whose country was a signatory.
—Arkansas Online, 12 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 23 Oct. 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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