Confession (noun)

1. An admission of guilt or wrongdoing.
2. A statement revealing one's secrets or feelings.
3. A formal statement of religious belief.

Origin:

Late middle english: from old french, or from latin confessio(n-), from confiteri "acknowledge".

Examples:

1. He made a full confession and provided the police with details of the crime.
2. She made a confession of love to him.
3. He made a confession of faith in the Catholic Church.
4. The company issued a public confession and apology for their actions.
5. His confession was used as evidence in court.