fault
noun
uk/fɔːlt/ us [ C ]
something that is wrong with a machine or system:
The car had a serious design fault and had to be recalled.
An electrical fault caused the fire.
[ U ]
the fact of being responsible for something bad that happens:
be sb's fault (that) It was the traders' fault that so many billions were lost.
be the fault of sb The court found that the accident was the fault of the local authority.
the fault lies with sb We need to decide whether the fault lies with the buyer or the seller in this case.
no-fault LAW
relating to legal processes, insurance claims, etc. in which it is not necessary to decide who is responsible for a bad situation:
He introduced the nation's first no-fault auto insurance law.
a no-fault contract/divorce/system