The term ex cathedra, meaning "from the throne", is used to designate official pronouncements of the pope intended for a world audience. As a throne or armchair symbolizes the power to teach, the cathedra in this case refers to the teaching authority over the whole church rather than to a chair. According to Catholic dogma, the pope's statements ex cathedra are infallible in matters of faith and morals. In Anglican episcopal governance, episcopal teaching is conditioned by synodical governance, and so bishops cannot be said to speak ex cathedra in this way (although they may jocularly be said to do so).
Read more about this topic: Cathedra