1. a building where theatrical performances or motion-picture shows can be presented

- the house was full

Similar word(s): house, theatre

Definition categories: man–made, building, edifice

2. the art of writing and producing plays

Similar word(s): dramatics, dramaturgy, theatre

Definition categories: communication, communicating

3. a region in which active military operations are in progress

- the army was in the field awaiting action

- he served in the Vietnam theater for three years

Similar word(s): field, theatre

Definition categories: location, region

Sentences with theater as a noun:

- His grandfather was in the Pacific theater during the war.

- This man is about to die, get him into theater at once!

- We sat in the back row of the theater and threw popcorn at the screen.

- I worked in the theater for twenty-five years.