Dictionary

lights–out

noun \ˈlīts-ˈat\

: a time when people (such as soldiers, prisoners, or students) are required to turn out the lights and go to bed

Full Definition of LIGHTS-OUT

1
:  a command or signal for putting out lights
2
:  a prescribed bedtime for persons living under discipline

First Known Use of LIGHTS-OUT

1868

Browse

2 ENTRIES FOUND:
Next Word in the Dictionary: light splitterPrevious Word in the Dictionary: lightsome (adjective)All Words Near: lights-out
July 04, 2015
stringent Hear it
rigorous, strict, or severe
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears