1. A secret word or phrase known only to a restricted group
   - password, watchword, word, parole 
2. A second confirming signature endorsing a document already signed
   - countersignature

1. Add one's signature to after another's to attest authenticity
   "You must countersign on this line of the contract"

Derived forms: countersigned, countersigns, countersigning

Type of: arcanum, positive identification, secret, sign, signature

Encyclopedia: Countersign

• Second Council of Lyons
• Second Council of Nicaea
• second cousin
• second cranial nerve
• Second Crusade
• second deck
• Second Earl Grey
• Second Earl of Chatham
• Second Earl of Guilford
• Second Empire
• Second Epistel of John
• Second Epistle of Paul the Apostle to the Corinthians
• Second Epistle of Paul the Apostle to the Thessalonians
• Second Epistle of Paul the Apostle to Timothy
• Second Epistle of Peter
• Second Epistle to the Corinthians
• Second Epistle to the Thessalonians
• Second Epistle to Timothy
• second estate
• first-class honors degree
• first-class honours degree
• first-class mail
• first-come-first-serve
• first-degree burn
• first-generation