What is the message from the house manager to stage management indicating the house is ready for performance?

The term that conveys the message from the house manager to stage management indicating that the house is ready for performance is "Clearance." This signal is crucial in the theater environment, as it denotes that everything is in place for the audience to enter and that the performance can begin without any issues.

This message ensures that stage management is aware that the house (the audience area) has been prepared, any last-minute checks have been completed, and any necessary safety protocols are in place. It creates a seamless transition between the front of house (the audience area) and the back of house (the performance space).

While terms like "signal" and "notification" could also be somewhat related, they do not specifically capture the established terminology used in theater management for this particular context. "Commencement" refers to the start of something and lacks the specific connotation of readiness that "clearance" implies in a theater setting. Thus, "Clearance" is the proper term that indicates all is set for the performance to commence.