at fault

1. 1.

   deserving blame

   “admitted to being at fault”

   Similarguilty

Questions about at fault

What does at fault mean?

at fault means "deserving blame".

Is at fault a common word?

at fault is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.