roar - definition and synonyms

noun [countable] 

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/rɔː(r)/
singularroar
pluralroars
  1. 1
    the noise that a crowd of people make when they are angry or excited

    We heard the roar from inside the stadium.

  2. 2
    a loud noise made by something such as an engine or a storm

    the deafening roar of the sea

     Synonyms and related words
  3. 3
    [usually singular]

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    the loud deep sound that a lion makes