Webster's Online Dictionary
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Date "BLACK-OUT" was first used in popular English literature: sometime before 1939. (references)

Specialty Definition: BLACK-OUT

DomainDefinition
Electrical EngineeringThe suppression of the picture signal from a short time before, until a short time after, the synchronizing pulse. Source: European Union. (references)

Source: compiled by the editor from various references; see credits.

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Topics by Level of Interest: BLACK-OUT

Topics sorted by level of InterestLevel (1=low, 600=high)   Topics sorted AlphabeticallyLevel (1=low, 600=high)
Black-Out4   Black-Out4

Source: the editor, created by/for EVE to gauge likely levels of human interest in linguistically triggered topics (compiled across various sources, such as Wikipedia and specialty expression glosses).