murmur - definition and synonyms

noun 

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/ˈmɜː(r)mə(r)/
singularmurmur
pluralmurmurs
  1. 1
    [countable]

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    something that is said in a very quiet voice

    Let’s go,’ he said in a low murmur.

  2. 2
    [singular] a quiet continuous sound
    murmur of:

    a low murmur of voices

    the soft murmur of the wind

  3. 3
    [countable] a complaint about someone or something that you make in a quiet or secret way
  4. 4
    [countable] medical an unusual quiet sound made by your heart that may be a sign of disease or damage

    a heart murmur