theatre

ot noun

1. A region where a particular action takes place; a specific field of action, usually with reference to war. His grandfather was in the Pacific theater during the war.
2. An operating theatre or locale for human experimentation. This man is about to die, get him into theater at once!
3. A cinema. We sat in the back row of the theater and threw popcorn at the screen.
4. Drama or performance as a profession or art form. I worked in theater for twenty-five years.