dim-out

or dim·out

[ dim-out ]

noun

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

Word History and Origins

Origin of dim-out¹

First recorded in 1940–45; dim + (black)out

Example Sentences

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

From Project Gutenberg