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  1. u·ni·son
  2. noun

    • 1. simultaneous performance of action or utterance of speech:

      “Yes, sir,” said the girls in unison
    • 2. coincidence in pitch of sounds or notes:

      the flutes play in unison with the violas
    • 3. a combination of notes, voices, or instruments at the same pitch or (especially when singing) in octaves:

      good unisons are formed by flutes, oboes, and clarinets


    • 1. performed in unison:

      unison congregational singing
  3. Variation

    • n.: noun: unison, plural noun: unisons

    • noun

      simultaneous performance or utterance of action or speech:

      coincidence in pitch of sounds or notes:

    • adjective

      performed in unison:
    • (in the UK) a trade union formed in 1993 and representing employees in the health service and public sector.
    • noun

      a string in a piano or other instrument tuned to the same pitch (or to a pitch an octave higher) as another string and meant to be sounded with it.
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