/ˈsɪɡnəˌtɔri steɪt/ – Phrase
Definition: nước ký kết hiệp ước.
A more thorough explanation: A signatory state refers to a country that has signed a treaty or agreement, indicating its intention to be bound by the terms of that treaty once it is ratified.
Example: The signatory state agreed to abide by the terms of the treaty.