Meaning of the word "fatal flaw" in English

What does "fatal flaw" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

fatal flaw

US /ˈfeɪtəl flɔː/
UK /ˈfeɪtəl flɔː/

Noun

1.

a character trait or defect that leads to the downfall of a hero or protagonist in a tragedy

Example:
Pride was his fatal flaw, leading to his ultimate demise.
The hero's impulsiveness proved to be his fatal flaw.
2.

a fundamental weakness or imperfection that causes something to fail or be unsuccessful

Example:
The software's fatal flaw was its inability to handle large amounts of data.
Lack of communication proved to be the fatal flaw in their business plan.