Meaning of the word "at fault" in English

What does "at fault" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

at fault

US /ət fɔlt/
UK /ət fɔːlt/

Idiom

responsible for an error or mistake

Example:
The driver was found to be at fault for the accident.
It's not my fault, I'm not the one at fault here.