<p><strong>Noun</strong></p><ul><li>Anything that resonates.</li><li>An appliance for increasing sound by resonance.</li><li>An instrument for detecting the presence of a particular frequency by means of resonance.</li><li>A hollow enclosure cavity resonator made of conducting material of such dimensions that electromagnetic radiation of a certain frequency will resonate.</li><li>Any circuit having this frequency characteristic.</li><li>Something that impedes; an obstacle or hindrance.</li></ul><p><strong>End of Response</strong></p>