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countersign

noun

coun·​ter·​sign ˈkau̇n-tər-ˌsīn How to pronounce countersign (audio)
1
: a signature attesting the authenticity of a document already signed by another
2
: a sign given in reply to another
specifically : a military secret signal that must be given by one wishing to pass a guard
countersign transitive verb
countersignature
ˌkau̇n-tər-ˈsig-nə-ˌchu̇r How to pronounce countersign (audio)
-chər
-ˌtyu̇r
-ˌtu̇r
noun

Example Sentences

the guard demanded the countersign

Word History

First Known Use

1591, in the meaning defined at sense 1

Time Traveler
The first known use of countersign was in 1591

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