Of or relating to a musical instrument that doesn't produce specific pitches, e.g. many drums and cymbals.(adjective)
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Use "untuned" in a sentence
"Hiatt's eponymous Gibson dreadnought buzzed and untuned itself throughout the two-hour performance, which added a rock-and-roll edge to the unplugged affair."
"Drunken college students strum untuned strings and shout incoherent lyrics into flames of illegal campfires."
"Considerable skill was required to do this, however, and an untuned Model 70 trigger was a horror."