/ flɔː; NAmE / noun
1.
flaw (in sth) a mistake in sth that means that it is not correct or does not work correctly
SYN defect , fault :
The argument is full of fundamental flaws.
The report reveals fatal flaws in security at the airport.
2.
flaw (in sth) a crack or fault in sth that makes it less attractive or valuable
3.
flaw (in sb/sth) a weakness in sb's character :
There is always a flaw in the character of a tragic hero.
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WORD ORIGIN
Middle English : perhaps from Old Norse flaga slab. The original sense was a flake of snow , later, a fragment or splinter , hence a defect or imperfection (late 15th cent.).