# countersign

> English word · Noun

## Definitions
1. A second signature added to a document to affirm the validity of the signature of the first person.
2. The response to a sign or signal.

## Etymology
From Middle French contresigne. Equivalent to counter- + sign.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/countersign