countersign

Fetched 2026-10-26 (cache).

Synonyms: counterion, countersink, countersigns, counter ion, counterpin

Antonyms: counterion, countersink, countersigns, counter ion, counterpin

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{lb|en|law}} 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]].

Verb

1. {{lb|en|transitive}} To [[sign]] on the [[opposite]] [[side]] of (a [[document]]).
2. {{lb|en|transitive|by extension}} To add a second [[signature]] to a document, [[affirm]]ing the [[validity]] of the [[signature]] of another [[person]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.