Visionary (Noun) A person with original ideas about what the future will or could be like. Thomas Edison was a visionary because he invented the lightbulb.
Audience (Noun) A group of people who have gathered to watch a performance or public event. The audience sat and watched The wonderful wisard of OZ play.
Phonograph (Noun) A machine that reproduces sound (music) by placing a needle in contact with a grooved rotating disk; a recorder player. I have a phonograph upstairs in my bedroom.
Xylophone (Noun) A musical instrument played by striking a row of wooden bars of different lengths with one or more small wooden or plastic mallets. Some people have xylophones and they are really loud.
Auditorium (Noun) The part of a theater, concert hall, or other public building in which the audience sits. I sat in an auditorium when I had my band concert.