an embossed emblem, figure, symbol, word, letter, etc., used as attestation or evidence of authenticity.
a stamp, medallion, ring, etc., engraved with such a device, for impressing paper, wax, lead, or the like: The king took the seal from his finger and applied it to the document.
the impression so obtained: It was unmistakably the royal seal on the document.
a mark or symbol attached to a legal document and imparting a formal character to it, originally wax with an impression.
a piece of wax or similar adhesive substance so attached to an envelope, folded document, etc., that it must be broken when the object is opened, insuring that the contents have not been tampered with or altered.