Plays are generally performed in a theatre, by actors. To better communicate a unified interpretation of the text in question, productions are usually overseen by a director, who often puts their own unqiue interpretation on the production. (see theatre and related topics for more detailed information on the process of producing plays for performance).
The interpretive nature of drama is what makes it so appealing to so many performers and audience members alike — because a playwright is incapable of presenting the play in its intended format (a performance) without the aid of the actors and a director (though he may choose to take any of these roles himself — Molière, for example, often acted in his own plays), a play is by definition undergoing constant rebirth and renewal as new experiences and interpretations are brought by new contributors.
