<p><strong>Noun</strong></p><ul><li>something that serves as a protection or defense or that ensures safety.</li><li>a permit for safe passage.</li><li>a guard or convoy.</li><li>a mechanical device for ensuring safety.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to guard; protect; secure.</li><li>Synonyms: shield, defend</li></ul>