Question: What is “theatre within the theatre?”?
I know that it’s Luigi Pirandello’s big contribution to the world of theatre, but honestly, I haven’t been able to find a legit definition for it. The closest I’ve found is something like “blurring the lines between simulation and fiction,” which doesn’t really mean anything to me. Please help me out!

Answer:

Answer by Dreamscape
It is essentially the representation of theatre, within an actual theatre show.

Another example is the play that is put on in Hamlet.