English Lexicon

Fatal flaw

/ˈfeɪ.təl flɔː/
nounCEFR C1 (Advanced)Top #14500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    A critical weakness or shortcoming in a person's character that leads to their downfall.

    "His overwhelming pride proved to be his fatal flaw, ultimately costing him his career and reputation."
  2. 2

    A fundamental defect in a system, plan, or design that inevitably causes it to fail.

    "Engineers discovered a fatal flaw in the bridge's suspension design during stress testing."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

The term combines 'fatal', originating from the Latin 'fatalis' (destined, ordained by fate, or causing death/destruction), with 'flaw', derived from Old Norse 'flaga' (slab, flake) or Middle English roots meaning a crack or breach. Historically rooted in literary criticism (such as the concept of the tragic flaw or 'hamartia'), it has evolved into common usage to describe any crucial weakness that causes a plan, system, or character to fail.

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