1. A building in which live shows are performed for an audience. (Not to be confused with a movie theater
2. A specific room or space designated for the performance of a live show.
3. The craft or study of creating live performances. (Not to be confused with film
4. Used to describe one who is loud, 'artsy' and/or 'weird' and who has an interest in theatre.
5. For, of, or referring to the theatre.