lights out

Chiefly Military. a signal, usually by drum or bugle, that all or certain camp or barracks lights are to be extinguished for the night.
Example Sentences for lights out
And when the music finally began, the boys cut the lights out and proceeded to select dancing partners.
Once her backhand melted down, it was lights out down under.
And the way you have to do it is with all the lights out, and you can only use one eye and a small penlight.
Closing a business takes a little more than turning the lights out and locking the door.
British Dictionary definitions for lights out
lights out
1.  the time when those resident at an institution, such as soldiers in barracks or children at a boarding school, are expected to retire to bed
2.  a fanfare or other signal indicating or signifying this

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Slang related to lights out

lights out

noun phrase
  1. Bedtime : Lights out is at 10:30
  2. The end; death; curtains : otherwise lights out for me

punch someone's lights out, shoot the lights out

Dictionary of American Slang
Copyright © 1986 by HarperCollins Publishers
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Difficulty index for lights out

Few English speakers likely know this word

Tile value for lights

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Quotes with lights out