1

black box

noun
Updated on: 17 Nov 2017

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
3 : 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

Examples of black box in a Sentence

  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


2

black box

adjective

Definition of 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

Recent Examples of black box from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'black box.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of black box

1968


BLACK BOX Defined for English Language Learners

black box

noun

Definition of black box for English Language Learners

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


Medical Dictionary

black box

adjective

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 on a prescription drug's label or accompanying literature
  • A “black box” warning is the most serious warning placed in the labeling of a prescription medication.
  • —Johnathan D. RockoffThe Fort Worth (Texas) Star-Telegram8 June 2007

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