signatory
UK: ˈsɪɡnətəri | US: ˈsɪɡnətɔːri
n. a person or organization that has signed an official document, especially a treaty or contract
The word "signatory" originates from Latin signatorius, meaning "pertaining to sealing or signing." It combines signum (mark) with the agentive suffix -atorius, reflecting a person who marks or signs a document. The term evolved in English to specifically denote parties bound by a signed agreement, emphasizing the act of formal commitment.
All signatories to the treaty must adhere to its terms.
The company became a signatory of the environmental pledge.
As a signatory, she was legally obligated to fulfill the contract.
The document lists every signatory in alphabetical order.
Nations acting as signatories must ratify the agreement domestically.