"Dramaturgy is the art of dramatic composition and the representation of the main elements of drama on the stage. Dramaturgy is a distinct practice separate from play writing and directing, although a single individual may perform any combination of the three.Some dramatists combine writing and dramaturgy when creating a drama. Others work with a specialist, called a dramaturg, to adapt a work for the stage."
Source: http://en.wikipedia.org/wiki/Dramaturgy
Definition #2:"Dramaturgy- A perspective that was developed by the symbolic interactionists Erving Goffman, that uses the theatrical metaphor of the stage, actors, and audiences to observe and analyze the intricacies of social interaction. Everyone is at once actor in relation to others as audience and audience in relation to others as actors. Expectations that apply in each situation constitute a social script that actors use to guide rather than dictate their performance."
"Dramaturgy-the theory and practice of dramatic composition"
Source: http://oxforddictionaries.com/definition/dramaturgy