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thunder - definition and synonyms

 
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noun thunder pronunciation in American English /ˈθʌndər/
  1. 1
    [uncountable] the loud noise that you sometimes hear in the sky during a storm
    a clap of thunder (=a single very loud noise)
    a roll of thunder (=a series of noises)
  2. 2
    [singular] a loud noise similar to thunder
    the thunder of hooves on the dry earth
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