a mistake, especially something for which you are to blame
It is my fault that the cat ran away. I left the door open.
Admitting her fault, she apologized for the misunderstanding and took steps to rectify it.
The mechanic acknowledged the fault in the repairs and fixed the issue without additional charges.
Despite his fault in the project, he learned from the experience and improved his approach in subsequent tasks.
The company accepted responsibility for the fault in the product and initiated a recall for replacements.
