As a Noun: 1. A religious act in which you tell a priest about your sins and ask for forgiveness. English = confession. 2. A small room in a church where Christians, especially Roman Catholics, go to confess their sins. English = confessional. As a Verb or Adjective: 1. To tell a priest about your sins and ask for forgiveness. English = confess. Idiomatic English = make a confession.