Home › Words › C › countersigncountersigncountersign means A second signature added to a document to affirm the validity of the signature of the first person.EtymologyFrom Middle French contresigne. Equivalent to counter- + sign.nounA second signature added to a document to affirm the validity of the signature of the first person.The response to a sign or signal.e.g.“Only those who give the countersign may enter the Masonic Lodge.”verbTo sign on the opposite side of (a document).To add a second signature to a document, affirming the validity of the signature of another person.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.countersignature 88% match — A signature made to confirm or endorse another. vs countersign →countersigner 81% match — One who countersigns a document. vs countersign →countersignatory 81% match — One who makes a countersignature. vs countersign →countersurety 64% match — A counter bond, or a surety to secure one who has given security. vs countersign →countermark 63% match — A mark or token added to those already existing, as a security or proof. vs countersign →counteraffirmation 63% match — An affirmation in opposition to another affirmation. vs countersign →cosignatory 62% match — Any of several people who sign a document together (especially a treaty) vs countersign →counterseal 61% match — To seal or ratify with another or others. vs countersign →