countersign

Part of speech: verb

To authenticate by an additional signature.

Part of speech: noun

A secret password; watchword.

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Usage examples "countersign":

  1. I, as usual, procured the countersign for that night, so as to be able to get inside the picket post if I should come back in the night, and selecting thirty men, started at five p. - "In and Out of Rebel Prisons", Lieut. A. [Alonzo] Cooper.
  2. If he sees this, his memory will countersign it. - "My Life as an Author", Martin Farquhar Tupper.
  3. The Ristigouche Salmon Club has its guardians stationed all along the river, and they are quite as inflexible in seeing that their employers keep this law as the famous sentinel was in refusing to let Napoleon pass without the countersign. - "Little Rivers A Book Of Essays In Profitable Idleness", Henry van Dyke.