Blackout

Part of speech: noun, verb

Pronunciation: /ˈblæk.aʊt/

Definitions

  1. A sudden loss of electrical power, consciousness, or the deliberate concealment of information or communication
  2. A temporary interruption in electrical supply, a state of unconsciousness or memory loss, or the intentional suppression of certain information or disclosures
  3. The cessation of power provision, a lapse in awareness or recollection, or a strategic withholding of relevant data or messages

Etymology: The term originated in the early 20th century, first appearing in contexts related to wartime precautions. During World War II, especially in Britain and other Allied nations, "blackout" referred to the enforced darkening of cities at night. This was done to confuse enemy bombers and protect civilians, by eliminating visible lights that could serve as targets. The term quickly became associated with these government-mandated measures, capturing a moment when darkness was imposed deliberately for safety. Before this, the components of the word were straightforward: "black" from Old English "blæc," meaning dark or without light, and "out," indicating a cessation or removal. The combination suggested the extinguishing or covering up of lights. Its use as a verb—meaning to cause such a darkening—naturally followed from this noun sense, describing the act of enforcing the blackout. Over time, the meaning broadened beyond physical darkness. It came to describe any temporary loss or suppression, such as a loss of electrical power or even a temporary loss of consciousness or memory. The figurative use, particularly in medical or psychological contexts, evokes the sudden and total "darkening" of awareness, similar to how cities were plunged into darkness during wartime. The word thus moved from a literal, concrete action—turning off lights to avoid detection—to more abstract uses involving interruption or loss, illustrating how a practical term can expand its reach across different fields while retaining a clear conceptual metaphor rooted in darkness and absence of light.

Synonyms: power outage, darkness

Antonyms: illumination