Definition of "lights-out" in Anglais

Noun

1. The time at night at which artificial lights are to be turned off, a curfew or bedtime.

2. The prescribed bedtime for persons living in a boarding school or staying in a hospital.

   • We were all expected to be in bed by lights-out.

3. Something hopeless, over; unconsciousness. .mw-parser-output .object-usage-tag{font-style:italic}.mw-parser-output .deprecated{color:var(--wikt-palette-grey-lime-8,olivedrab)}[ with for and noun phrase]

   • It's gonna be lights out for you, pal!

4. A decisive play. This term needs a definition. Please help out and add a definition, then remove the text {{rfdef}}.

Adjective

1. Done or performed in the dark because of a fully automated working environment. Often describes night shift or third shift work.

   • lights-out manufacturing
   • Their night shift is lights-out production. Their day shift handles tooling, setup, and staging to make sure that everything is ready for the next lights-out run.