(1874-1951) an Austriancomposer who went to the US in 1933. He invented the "twelve-tone system" of writing modern music, in which music is written around a set of twelve notes of a Chromaticscale. His system has influenced many modern composers. His works include Transfigured Night, Pierrot Lunaire, and an opera that he did not finish Moses and Aaron.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.
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