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adjective American English pronunciation: fatal /ˈfeɪt(ə)l/
  1. 1
    causing someone to die
    a fatal accident/injury/disease etc.:

    a fatal road accident

    prove fatal (=cause death):

    In the nineteenth century childbirth often proved fatal.

  2. 2
    with very serious negative effects
    prove fatal (=destroy something):

    The recession has proved fatal to many businesses.

    a fatal blow:

    The sudden resignations dealt a fatal blow to the society.

    a fatal mistake/error:

    I made the fatal mistake of falling in love with him.

    fatal flaw (=serious fault):

    Yesterday's report highlighted fatal flaws in the system.

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