Definition of dissonance noun from the Oxford Advanced Learner's Dictionary

     

    dissonance

     noun
    noun
    BrE BrE//ˈdɪsənəns//
     
    ; NAmE NAmE//ˈdɪsənəns//
     
    Describing music
     
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  1. 1 [countable, uncountable] (music) a combination of musical notes that do not sound pleasant together opposite consonance See related entries: Describing music
  2. 2[uncountable] (formal) lack of agreement
  3. Word Origin late Middle English: from Old French, from late Latin dissonantia, from Latin dissonant- ‘disagreeing in sound’, from the verb dissonare.
See the Oxford Advanced American Dictionary entry: dissonance