n. 1. a. The act or process of diminishing; a lessening or reduction. b. The resulting reduction; decrease. 2. Music Statement of a theme in notes of lesser duration, usually one-half, of the original. [Middle English diminucioun, from Old French diminution, from Latin dīminūtiō, dīminūtiōn-, from dīminūtus, past participle of dīminuere; see DIMINISH.] dim′i·nution·al adj. |
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