prompter's box

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun the raised box in the apron of a stage, opening towards the actors. The prompter sits inside with the prompter's book, ready to give cues for missed or forgotten lines.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a booth projecting above the floor in the front of a stage where the prompter sits; opens toward the performers on stage