Definitions of countersign
to sign your name next to another person's signature eg to confirm that the other person is who they say they are
The mayor must sign all checks which must then be countersigned by the city clerk.
countersign
verb
verb
to sign your name next to another person's signature eg to confirm that the other person is who they say they are
The mayor must sign all checks which must then be countersigned by the city clerk.