The Meaning of Theatre?

What does theatre mean? I constructed this word cloud by importing the text from two Wikipedia articles "drama" and "theatre." It makes sense, then, that those are the largest terms visible in the cloud. I edited most terms that were only mentioned once, especially names and linking words like between, such, and therefore. But I also edited out countries and languages that were only mentioned once- Hindu, Sanskrit, Chinese, etc.- making a very Westernized cloud that features "Greek" as prominently as "Play."

I have edited the already limited meaning of theatre presented on Wiki. Tell me- how would you define theatre? What would you choose to add or remove or make prominent?