noun
EXAMPLES FROM CORPUS
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A second later there was a loud click and buzz which could only be the black box alarm being activated.
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Accident investigators have found the black box flight recorder.
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It was a small black box , rather like the Thing, mounted on little treads.
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New investigative techniques have opened up the black box of the brain and have begun to shed light on its inner workings.
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The briefcase-sized black box contained a keyword selection computer.
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They're still looking for his black box .