dim-out

or dim·out

[ dim-out ]
/ ˈdɪmˌaʊt /

noun

a reduction or concealment of night lighting in wartime to make the source less visible to an enemy from the air or sea.
a reduction of night lighting caused by a failure in an electric generating system or a reduction in its output.

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Origin of dim-out

First recorded in 1940–45; dim + (black)out
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for dim-out

  • Along the shore no lights were showing for the dim-out was rigidly enforced at Sunset Beach.

    Voice from the Cave|Mildred A. Wirt