Definition of avalanche noun from the Oxford Advanced American Dictionary

     

    avalanche

     noun
    noun
    NAmE//ˈævəˌlæntʃ//
     
    (also snowslide)
     
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  1. 1a mass of snow, ice, and rock that falls down the side of a mountain alpine villages destroyed in an avalanche He was killed in an avalanche while skiing.
  2. 2(figurative) We received an avalanche of letters in reply to our advertisement.
See the Oxford Advanced Learner's Dictionary entry: avalanche