<p><strong>Noun</strong></p><ul><li>approval or sanction: The program for supporting the arts won the government's endorsement.</li><li>the placing of one's signature, instructions, etc., on a document.</li><li>the signature, instructions, etc., placed on the reverse of a commercial document, for the purpose of assigning the interest therein to another.</li><li>a clause under which the stated coverage of an insurance policy may be altered.</li></ul>