<p><strong>Noun</strong></p><ul><li>a person or thing that detects.</li><li>a device for detecting smoke, fire, or some other hazardous condition.</li><li>a device for detecting the presence of metal, contraband, or other items that might be hidden or concealed.</li><li>a device for detecting electric oscillations or waves.</li><li>a device, as a crystal detector or a vacuum tube, that rectifies the alternating current in a radio receiver.</li></ul><p><strong>End of Response</strong></p>