noun /ˈɹeɪdiˌəʊ drâma,ˈɹeɪdiˌoʊ drâma/
dramatized, purely acoustic performance, broadcast on radio or published on audio media, such as tape or CD
STREAMING AUDIO & VIDEO: Including our live "Seeing Ear Theatre" radio drama staring Walter Koenig, classic SF & horror movies, Orson Welles WAR OF THE WORLDS broadcast, episodes of MYSTERY SCIENCE THEATER 3000, Alien Voices, readings by Greg Bear, Sam Delany, Bruce Sterling & K.W. Jeter, cartoons, classic trailers & more!
Wikipedia foundation.