with obj.
- add a signature to (a document already signed by another person)副署; 会签（文件等）：
each cheque had to be signed and countersigned.
每张支票都必须有签名和会签。
- archaic a signal or password given in reply to a soldier on guard〈古〉应答信号（或暗号）; 应答口令。
派生词
countersignature
noun词源
late 16th cent. （as a noun）： from French contresigner (verb), contresigne (noun), from Italian contrassegno, based on Latin signum 'sign'.