What is a Cosmos?
That was a very difficult question to answer. After all, a Cosmos was something very different to different kinds of people.
Most Cultivators weren't able to tell the difference between a Cosmos and a world. A Cosmos was just another word for a world, right?
A world included the Laws of Time, Space, Gravity, Matter, Elements, and all the nuances of living beings. A world already included everything.
A Cosmos didn't add anything on top of that.
Their definition was correct.
For them, it didn't make a difference.
The concept of a world already encompassed everything they had ever known. A world was their entire life.
What did more powerful people think about what a Cosmos was?
It was a more powerful world.
By knowing the Law of the True World and knowing the Law of Energy, one would be able to build a Cosmos. So, logically, a Cosmos was just a world with more power.