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countersign

[ noun, verb koun-ter-sahyn; verb also koun-ter-sahyn ]
/ noun, verb ˈkaʊn tərˌsaɪn; verb also ˌkaʊn tərˈsaɪn /
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noun
a sign used in reply to another sign.
Military. a secret sign that must be given by authorized persons seeking admission through a guarded area.
a signature added to another signature, especially for authentication.
verb (used with object)
to sign (a document that has been signed by someone else), especially in confirmation or authentication.
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Origin of countersign

1585–95; counter- + sign, modeled on Middle French contresigne, or its source, Old Italian contrasegno
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use countersign in a sentence

British Dictionary definitions for countersign

countersign

verb (ˈkaʊntəˌsaɪn, ˌkaʊntəˈsaɪn)
(tr) to sign (a document already signed by another)
noun (ˈkaʊntəˌsaɪn)
Also called: countersignature the signature so written
a secret sign given in response to another sign
mainly military a password
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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