Question

What does it mean to be expelled from the academy of motion pictures.

Answer 1

That means you are no longer allowed to come back, usually when you are explelled, it is for good reason.

What does that mean, though?

Great question, being expelled direct quotation from dictionary means...

1. "deprive (someone) of membership of or involvement in a school or other organization."
2. "force (someone) to leave a place, especially a country."
3. "force out or eject (something), especially from the body."

With that information, definition 1 makes the most sense here. Therefore, being expelled from the academy would mean you are banned.