<p><strong>Noun</strong></p><ul><li>The extinguishing or concealment of all visible lights in a city, military post, etc., usually as a precaution against air raids.</li><li>A period during a massive power failure when the lack of electricity for illumination results in utter darkness except from emergency sources, as candles.</li><li>The extinguishing of all stage lights, as in closing a vaudeville skit or separating the scenes of a play.</li><li>Temporary loss of consciousness or vision.</li><li>A period of total memory loss, as one induced by an accident or prolonged alcoholic drinking.</li><li>A complete stoppage of a communications medium, as by a strike, catastrophe, electrical storm, etc.</li><li>A prohibition that is imposed on the broadcasting of an event and has the purpose of encouraging or ensuring ticket sales.</li></ul><p><strong>End of Response</strong></p>