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Use "untheatrical" in a sentence
"The only weak link is Alicia Keys's incidental music, which is untheatrical and repetitious."
"At this level, the best riding performance is the efficient, untheatrical one that gets the job done."
"Many of the recordings are more interesting for teaching value than listening value -- that is, they're great learning tools for anyone who is putting on one of these shows and wants to hear all the dance music et al, but many of them sound under-rehearsed and untheatrical."