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Definition of countersign

countersign

/ˈkaʊntərˌsaɪn/
coun · ter · sign

Plural:countersigns
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Past Simple:countersigned
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Past Participle:countersigned
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Present Participle:countersigning
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countersign Lexical Profile

countersign Game Scores & Validity

• verb

1

To sign a document that has already been signed by someone else in order to verify its authenticity or confirm its validity.

Example

"The treasurer must countersign all checks exceeding five thousand dollars."

Synonyms
View all synonyms for countersign

• noun

1

A signature added to a document that has already been signed by another person, serving to authenticate or ratify it.

Example

"The contract requires the countersign of the department director before the funds can be released."


2

A secret word, phrase, or signal given in response to a guard's challenge in order to be allowed to pass.

Example

"The night watchman demanded the countersign before opening the heavy iron gate."

Synonyms
View all synonyms for countersign

Word Origin & Etymology

Borrowed in the late 15th century from Middle French contresigne (noun) and contresigner (verb), formed from contre- ('against, opposite') and signe ('sign, mark'), from Latin signum.

Cite this Entry


Wordmom. (2026). Definition of Countersign. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/countersign
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