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. 英国是该条约的签署国。 [as modifier]the signatory states. 签署国。
语源
late 19th cent.: from Latin signatorius 'of sealing', from signat- 'marked (with a cross'), from the verb signare