English definition of “fault”
sb's fault › 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.
at fault › responsible for something bad that has happened: I was at fault and I would like to apologize.
› [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