Meaning of the word "black box" in English

What does "black box" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

black box

US /ˌblæk ˈbɑːks/
UK /ˌblæk ˈbɒks/
"black box" picture

Noun

1.

a flight recorder in an aircraft, which records details of the flight and is used to investigate accidents

Example:
Investigators recovered the black box from the wreckage.
The black box revealed that the engine failed shortly after takeoff.
2.

a complex system or device whose internal workings are hidden or not understood

Example:
To many users, the algorithm is a black box.
The company treats its proprietary technology as a black box.