signatory

American  

[sig-nuh-tawr-ee, -tohr-ee] / ˈsɪg nəˌtɔr i, -ˌtoʊr i /

adjective

1. having signed, or joined in signing, a document.

   the signatory powers to a treaty.

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noun

plural

signatories

1. a signer, or one of the signers, of a document.

   France and Holland were among the signatories of the treaty.

signatory British  

/ ˈsɪɡnətərɪ, -trɪ /

noun

1. 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

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adjective

1. having signed a document, treaty, etc

Other Word Forms

• nonsignatory adjective

Etymology

Origin of signatory

1640–50, in earlier sense “used in affixing seals”; 1860–65 signatory for def. 2; < Latin signātōrius of, belonging to sealing, equivalent to signā ( re ) to mark, seal ( sign ) + -tōrius -tory ¹

Example Sentences

Jenkins alleges Davis remained a signatory on its bank accounts, directed spending, and used the collective impact nonprofit to cover personal expenses.

From Los Angeles Times • Apr. 2, 2026

Iran is also a signatory to the Nuclear Non-Proliferation Treaty, which makes the same pledge.

From Slate • Feb. 27, 2026

Around that time, both Kahn and Indyke had signatory authority on some accounts.

From The Wall Street Journal • Nov. 23, 2025

Under the climate accord, signatory nations are required every five years to submit stronger targets for cutting greenhouse gas emissions, thereby steadily raising the collective effort to reduce global warming over time.

From Barron's • Nov. 4, 2025

On the morning of March 7, thirty thousand German troops had rolled into the demilitarized Rhineland, in open defiance of both the Treaty of Versailles and the Locarno Pact to which Germany was a signatory.

From "The Boys in the Boat: Nine Americans and Their Epic Quest for Gold at the 1936 Berlin Olympics" by Daniel James Brown

Related Words

• autograph
• identification
• ink
• name
• seal
• stamp
• trademark