A place or building, consisting of a stage and seating, in which an audience gathers to watch plays, musical performances, public ceremonies, and so on.
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.
A lecture theatre.
An operating theatre or locale for human experimentation.
This man is about to die, get him into theater at once!
A cinema.
We sat in the back row of the theater and threw popcorn at the screen.
Drama or performance as a profession or art form.
I worked in theater for twenty-five years.
Any place rising by steps like the seats of a theater.