Definition 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: the 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