What does boule mean in Greek?

"Boule" is not a word in the Greek language. It is likely you are referring to the "Βουλή" (Boulé), which is a Greek word meaning "council" or "assembly".

It has a long history in Ancient Greek politics, and the term refers to various assemblies and councils throughout the centuries.

Here are some examples of its use:

* Boulé of the 500: The main legislative body in Ancient Athenian democracy.

* Gerousia: The council of elders in Sparta, also sometimes referred to as a Boulé.

If you have a specific context in mind, please provide more information so I can provide a more accurate answer.