black box
• noun
A heavily protected electronic recording device installed in an aircraft, typically painted bright orange for visibility, that logs flight parameters and cockpit audio to aid in investigating aviation accidents.
"Search crews recovered the aircraft's black box from the ocean floor to determine the cause of the mechanical failure."
A complex system, device, or computer algorithm whose inputs and outputs can be observed and measured, but whose internal workings remain hidden or are not readily understood.
"Many deep learning models operate like a black box, making it difficult for researchers to explain how a specific decision was reached."
A simple, unadorned performance space, typically a square room with black walls and a flat floor, designed to provide flexible staging and seating arrangements for experimental drama.
"The university drama department staged their minimalist production of the play in the campus black box."
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