Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun countersign

2 senses of countersign

Sense 1
password, watchword, word, parole, countersign -- (a secret word or phrase known only to a restricted group; "he forgot the password")
       => positive identification -- (evidence proving that you are who you say you are; evidence establishing that you are among the group of people already known to the system; recognition by the system leads to acceptance; "a system for positive identification can prevent the use of a single identity by several people")
       => secret, arcanum -- (information known only to a special group; "the secret of Cajun cooking")

Sense 2
countersignature, countersign -- (a second confirming signature endorsing a document already signed)
       => signature -- (your name written in your own handwriting)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb countersign

1 sense of countersign

Sense 1
countersign -- (add one's signature to after another's to attest authenticity; "You must countersign on this line of the contract")
       => sign -- (be engaged by a written agreement; "He signed to play the casino on Dec. 18"; "The soprano signed to sing the new opera")