I. ˈ ̷ ̷ ̷ ̷+ˌ- noun
Etymology: counter- + sign (n.); translation of French contresigne
1.
a. : a special mark for identifying or authenticating : countermark
b. : the signature of a secretary or other person to attest authenticity of a piece of writing already signed by another
2. : a sign used in reply to another ; specifically : a military secret signal (as a word or phrase) that must be given by anyone wishing to pass
II. | ̷ ̷ ̷ ̷+| transitive verb
Etymology: counter- + sign (v.); translation of French contresigner
1. : to add one's signature to (a document) after another's to attest authenticity
2. : confirm , corroborate , sanction