When someone speaks ex cathedra, they’re making an official, authoritative statement, often with the weight of a leader or expert behind it.
The phrase ex cathedra comes from Latin: ex means "from" and cathedra means "chair." Originally, it referred to a bishop speaking with authority from his official seat. Today, it’s used to describe any declaration made with official power, often in a formal or authoritative context. Such statements are intended to be taken seriously, reflecting the speaker's position of authority and the expectation that their words carry significant influence.