black box

1. 1.

   equipment that records information about the performance of an aircraft during flight

   Broaderrecorder

Questions about black box

What does black box mean?

black box means "equipment that records information about the performance of an aircraft during flight".

Is black box a common word?

black box is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.