Black box

/blˈak bˈɒks/

/blˈæk bˈɑːks/

Black box

a device in a plane that records all the information during the flight which is used to discover the cause in case of an accident

Examples

1. And that portions of any system of any considerable complexity become black boxes.

2. In other words, the black box society affects different populations in different ways.

3. Over on ABC, check out the premiere of "Black Box."

4. It's a black box.