signatory
/ˈsɪgnətərɪ/noun
(pl. -ies)
- a party that has signed an agreement, especially a state that has signed a treaty签署者; （尤指条约的）签署国：
Britain is a signatory to the convention
英国是该国际公约的签署国
as modifier the signatory states.签署国。
词源
late 19th cent.: from Latin signatorius 'of sealing'， from signat- 'marked (with a cross)'， from the verb signare.