coun ‧ ter ‧ sign /ˈkaʊntəsaɪn $ -ər-/ BrE AmE verb [transitive]
to sign a paper that has already been signed by someone else:
The note must be countersigned by a doctor.
coun ‧ ter ‧ sign /ˈkaʊntəsaɪn $ -ər-/ BrE AmE verb [transitive]
to sign a paper that has already been signed by someone else:
The note must be countersigned by a doctor.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012