Separation of church and state

The separation of church and state or separation of religion and state is a philosophical and jurisprudential concept for defining political distance in the relationship between religious organizations and the state. Conceptually, the term refers to the creation of a secular state (with or without legally explicit church-state separation) and to disestablishment, the changing of an existing, formal relationship between the church and the state.

Source: Wikipedia — Separation of church and state (CC BY-SA 4.0)