Dictionary

1black box

noun

: a device used in an airplane to record flight information (such as altitude or airspeed) or the voices of the pilots and crew

Full Definition of BLACK BOX

1
:  a usually complicated electronic device whose internal mechanism is usually hidden from or mysterious to the user; broadly :  anything that has mysterious or unknown internal functions or mechanisms
2
:  a crashworthy device in aircraft for recording cockpit conversations and flight data

Examples of BLACK BOX

  1. The black boxes were recovered from the crash site and provided useful information about the cause of the crash.

First Known Use of BLACK BOX

circa 1945

2black box

adjective

Definition of BLACK BOX

:  being or containing a warning of a serious or life-threatening side effect (as stroke or muscle damage) that is highlighted by a black border on a prescription drug's label or accompanying literature

First Known Use of BLACK BOX

1988

black box

adjective    (Medical Dictionary)

Medical Definition of BLACK BOX

:  being or containing a warning of a serious or life-threatening side effect (as stroke, muscle damage, or suicidal tendencies) that is highlighted by a black border <a black box warning on the drug's label>

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