\ ˈlīts-ˈau̇t
\
\
Definition of lights-out
1
: a command or signal for putting out lights
2
: a prescribed bedtime for persons living under discipline
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“Lights-out.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lights-out. Accessed 23 May. 2022.
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Time Traveler for lights-out
The first known use of lights-out was in 1868
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