■ noun historical
1》 a small seal, especially one set in a ring, used instead of or with a signature to give authentication to an official document.
2》 (usu. the Signet ) the royal seal formerly used for special purposes in England and Scotland, and in Scotland later as the seal of the Court of Session.
Origin
ME: from OFr., or from med. L. ~um , dimin. of signum 'token, seal'.