Theatre is a form of performing arts in which actors, singers, and dancers perform on stage in front of an audience. Acting is the art of performing characters in a play or film. CINEMA is a form of entertainment that involves watching films in a THEATER. PLAYHOUSE is a building specifically designed for theatrical performances. ARENA is a large, usually circular or oval, indoor space used for sports, concerts, and other forms of entertainment. DRAMA is a genre of literature that focuses on conflict and emotion to tell a story. All of these terms are related to theatre in some way, as they all involve performance and entertainment.