It is well known that the origin of drama goes back to ancient Greece. Drama means action, and action is indeed the essence of theatre. The word theatre also derives from ancient Greek. Theatron is the place where one goes to see something, where one becomes a spectator. 

What we see in a theatre are actors using their body, face and voice to communicate whatever the play wants to express. But drama is so much more than only witnessing, or seeing something. It is a whole collective experience where audience and actors communicate, interact and share.