<p><strong>Verb (used with object)</strong></p><ul><li>to secure or guarantee: This letter will ensure you a hearing</li><li>to make sure or certain: measures to ensure the success of an undertaking</li><li>to make secure or safe, as from harm</li><li>Synonyms: safeguard, guard, protect</li><li>insure (defs 1, 2, 3)</li></ul>