1. (noun) password, watchword, word, parole, countersign
a secret word or phrase known only to a restricted group
Synonyms: news, rallying cry, cry, war cry, battle cry, password, give-and-take, intelligence, word, parole, discussion, countersignature, countersign, tidings, watchword, word of honor
2. (verb) countersignature, countersign
a second confirming signature endorsing a document already signed
Synonyms: countersignature, password, countersign, parole, word, watchword
3. (verb) countersign
add one's signature to after another's to attest authenticity
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