black box

• blackbox

black box (plural black boxes)

1. (informal, aviation) The brightly colored cockpit voice recorders and flight data recorders in an aircraft designed to aid in determining the cause of an accident.
2. (transport, by extension) Any similar device on motor vehicles, such as rail event recorders and ship trip recorders.
3. A theoretical construct or device with known input and output characteristics but unknown method of operation.

• box

• (theoretical construct or device): black box testing

black box (third-person singular simple present black boxes, present participle black boxing, simple past and past participle black boxed)

1. (web development) To focus on the inputs and outputs without worrying about the internal complexity.