<p><strong>Noun:</strong></p><ul><li>a person or thing that depresses.</li><li>Surgery: an instrument for pressing down a protruding part, as a tongue depressor.</li><li>Anatomy: a muscle that draws down a part of the body, as the corner of the mouth.</li><li>Compare levator.</li><li>Also called depressor nerve: a nerve that, when stimulated, induces a decrease in activity, as a slowed heartbeat.</li></ul>