black box Meaning in the Cambridge English Dictionary
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Meaning of “black box” in the English Dictionary

"black box" in British English

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black boxnoun [C]

uk   us  
a ​smallmachine that ​recordsinformation about an ​aircraft during ​itsflight, used to ​discover the ​cause of an ​accident
(Definition of black box from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"black box" in American English

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black boxnoun [C]

 us   /ˈblæk ˈbɑks/
(Definition of black box from the Cambridge Academic Content Dictionary © Cambridge University Press)

"black box" in Business English

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black boxnoun [C]

uk   us  
[usually singular] a ​system or ​process that uses ​information to ​produce a particular set of ​results, but that ​works in a way that is ​secret or difficult to understand: The ​main problem with many ​internationalcapitalflows is that they are non-transparent - they come from, and reside within, a '​blackbox'.
a ​piece of ​electronicequipment used to ​record and ​storeinformation: Installation of a ​blackboxallows all ​emailssent and received to be ​monitored.
a ​piece of ​equipment on an ​aircraft that ​records the plane's ​movements and ​positions during a ​flight, and which can give important ​information if the ​plane has an accident: The ​blackbox often ​holdscritical clues for investigators looking for the cause of fatal ​planecrashes.
(Definition of black box from the Cambridge Business English Dictionary © Cambridge University Press)
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