The Oxford Thesaurus An A-Z Dictionary of Synonyms - sealn.

1) symbol, token, mark, insigne (pl. insignia) , sign, signet, crest, bearing, coat of arms, escutcheon, emblem, badge, monogram, identification, cartouche, design, imprint, stamp: The seal on his ring showed a crouching lion. 2) authentication, confirmation, verification, validation, affirmation, attestation, ratification, corroboration, assurance, guarantee or guaranty, endorsement, substantiation, evidence, notice, notification: Management set their seal of approval on the plans. --v. 3) Sometimes, seal off or up. close (off or up) , shut (off) , zip up, plug (up) , stop (up) , lock, bolt, secure, batten down, make airtight or waterproof; cork: All exits had been sealed off. They sealed up the windows so that no air could get in. 4) authenticate, confirm, verify, validate, affirm, attest, ratify, clinch, corroborate, assure, ensure, guarantee, endorse: The peace treaty was sealed by the marriage of the king to the emperor's daughter.