<p><strong>Adjective</strong></p><ul><li>Working or done out of public sight; secret: an undercover investigation.</li><li>Engaged in spying or securing confidential information: an undercover agent.</li></ul><p><strong>Synonyms</strong></p><ul><li>Hidden</li><li>Clandestine</li><li>Covert</li></ul><p><strong>End of Response</strong></p>