black box
noun(black box)
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
black box
noun(black box)
a crashworthy device in aircraft for recording cockpit conversations and flight data
black box
noun(black box)
a device in an automobile that records information (such as speed, temperature, or gasoline efficiency) which can be used to monitor vehicle performance or determine a cause in the event of an accident
black box
adjective(black box)
being or containing a warning of a serious or life-threatening side effect (such as stroke or muscle damage) that is highlighted by a black border on a prescription drug's label or accompanying literature