mea culpa
Mea culpa (noun) means an open admission that you were at fault, especially one made publicly. Example: “The chief executive's letter to shareholders was a lengthy mea culpa.”
How to use mea culpa
Learner’s notesIn plain EnglishAdmitting openly that something was your fault.
Formal or literary, and common in journalism and politics. Used ironically in casual speech for small mistakes.
An apologia is a defence of your position, not an admission of guilt, so it is close to the opposite of a mea culpa.
Trace the full origin ↓Fill the gap
Can you complete this real example?
The chief executive's letter to shareholders was a lengthy _____.
Etymology
From Latin mea culpa 'through my own fault', from the Confiteor prayer of the Roman rite.