Definitions of confession:

• noun:   (Roman Catholic Church) the act of a penitent disclosing his sinfulness before a priest in the sacrament of penance in the hope of absolution
• noun:   a written document acknowledging an offense and signed by the guilty party
• noun:   a document that spells out the belief system of a given church (especially the Reformation churches of the 16th century)
• noun:   a public declaration of your faith
• noun:   an admission of misdeeds or faults