noun (n)

• a building where theatrical performances or motion-picture shows can be presented(noun.artifact)

  Synonym:
  house, theatre
  

  source: wordnet30
• the art of writing and producing plays(noun.communication)

  Synonym:
  dramatic art, dramatics, dramaturgy, theatre
  

  source: wordnet30
• a region in which active military operations are in progress(noun.location)

  Example:
  He served in the Vietnam theater for three years.
  

  Synonym:
  field, field of operations, theater of operations, theatre, theatre of operations
  

  source: wordnet30
• An edifice in which dramatic performances or spectacles are exhibited for the amusement of spectators; anciently uncovered, except the stage, but in modern times roofed.(noun)

  source: webster1913