<p><strong>verb</strong></p><ul><li>(used without object) To fail in a course or examination.</li><li>(used with object) To fail to get a passing mark in: to flunk math.</li><li>To give a failing grade to; remove (a student) as unqualified from a school or course.</li></ul><p><strong>noun</strong></p><ul><li>A failure, as in a course or examination.</li></ul><p><strong>verb phrase</strong></p><ul><li>To fail and be unable to continue in: He flunked out of flight school.</li></ul>