(~s)
1.
A ~ in something such as a theory or argument is a mistake in it, which causes it to be less effective or valid.
Almost all of these studies have serious ~s.
N-COUNT: oft N in n
2.
A ~ in someone’s character is an undesirable quality that they have.
The only ~ in his character seems to be a short temper.
= defect, failing
N-COUNT: oft N in n
3.
A ~ in something such as a pattern or material is a fault in it that should not be there.
= imperfection
N-COUNT