What does the term "Ubiquitous Language" mean?

Ubiquitous Language is a shared language between developers and domain experts, where every term has exactly one meaning and is used the same way in code, documentation, and conversation.

Example: if the business says "the order is confirmed," the code should have order.confirm(), not order.status = 2.

Goal: remove ambiguity and the gap between the business and the program. Effect: the code becomes a living reflection of the real world, and the team speaks one language.