plural faults
1
a
: a bad quality or part of someone's character : a weakness in character
He loved her despite her many faults. [=failings]
Lack of courage is his worst fault.
In spite of her faults, she's a loyal friend. = For all her faults, she's a loyal friend.
b
: a problem or bad part that prevents something from being perfect : a flaw or defect
We discussed the book's strengths and faults. [=weaknesses]
If the book has a fault, it's that it's too long.
2
: responsibility for a problem, mistake, bad situation, etc.
The accident was not her fault. [=she did not cause the accident; she should not be blamed for the accident]
It's all my fault. [=I am responsible]
It's your own fault you missed that bus.
Through no fault of his own, he won't be able to attend the meeting.
3
tennis
: a mistake that results in a bad serve
She committed too many faults to win the match.
4
geology
: a break in the Earth's crust
Frequent earthquakes have occurred along the San Andreas Fault.
faults; faulted; faulting
1
: to criticize (something)
One critic faulted the book as (being) too long.
2
: to blame or criticize (someone)
The truck driver was faulted for the accident.
Many have faulted her for not acting sooner.
I can't fault him for trying to protect his family.
Cite this Entry
“Fault.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/fault. Accessed 19 Jun. 2026.
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