at fault

Idioms  

1. Responsible for a mistake, trouble, or failure; deserving blame. For example, At least three cars were involved in the accident, so it was hard to determine which driver was at fault, or He kept missing the target and wondered if the sight on his new rifle was at fault. In Britain this usage was formerly considered incorrect but is now acceptable; in America it has been widespread since the mid-1800s. Also see in the wrong.

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Example Sentences

See Examples For:

at fault

Waymo suggests its car is not at fault in the accident that was initially reported as an auto-pedestrian collision.

From Los Angeles Times ● Aug. 29, 2026

Was at fault when he pushed out Jensen's shot for Janelt's goal.

From BBC ● Aug. 22, 2026

In the popular Reddit forum “Am I the Asshole?” users describe a personal experience and others weigh in on whether the person is at fault.

From The Wall Street Journal ● Aug. 16, 2026

If he is found to be at fault and suspended, another by-election could be triggered.

From Barron's ● Aug. 14, 2026

There still wasn’t any indication Reggie could be at fault, but Ed obviously wanted to be there for his son.

From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel