Definition of windfall noun from the Oxford Advanced Learner's Dictionary

     

    windfall

     noun
    noun
    BrE BrE//ˈwɪndfɔːl//
     
    ; NAmE NAmE//ˈwɪndfɔːl//
     
     
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  1. 1an amount of money that somebody/something wins or receives unexpectedly The hospital got a sudden windfall of £300 000. windfall profits The government imposed a windfall tax (= a tax on profits to be paid once only, not every year) on some industries. She had an unexpected windfall when a cousin died.
  2. 2a fruit, especially an apple, that the wind has blown down from a tree The ground was covered with windfalls.
See the Oxford Advanced American Dictionary entry: windfall