{adj. phr.} Responsible for an error or failure; to blame. * /The driver who didn't stop at the red light was at fault in the accident./ * /When the engine would not start, the mechanic looked at all the parts to find what was at fault./ Syn.: IN THE WRONG.
AT FAULT
Meaning of AT FAULT in English
Slang English vocab. Английский сленговый словарь. 2012