Ubiquitous Language
Ubiquitous language - is a model that acts as a universal language to help communication between software developers and domain experts.
Collaborating, learning, and defining a model brings a lot of initial communication barriers between software specialists and domain experts. So evolving domain model with practicing the same type of communications (discussions, writings, and in diagrams) within a context is paramount for successful implementations, and that sort of conversation is called Ubiquitous Language.
