Meaning of “fault” - Learner’s Dictionary

fault

noun us uk /fɔːlt/
sb's fault

B1 If something bad that has happened is someone's fault, they are responsible for it:

She believes it was the doctor's fault that Peter died.

More examples

  • It's not my fault.
  • She won't mind if you're late - besides, it's not your fault.
  • Tom, I'm so sorry about last night - it was all my fault.
  • Admittedly I was partly to blame but it wasn't all my fault.
  • This is in no way your fault.
at fault

B2 responsible for something bad that has happened:

I was at fault and I would like to apologize.

B2 [ C ] something that is wrong with something or with someone's character:

The car has a serious design fault.
One of his faults is that he's a bad loser.
find fault with sb/sth

to criticize someone or something, especially without good reasons

(Definition of “fault noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)