English Dictionary

lights-out

/ˈlaɪts.aʊt/

noun

The time at night at which artificial lights are to be turned off, a curfew or bedtime. / The prescribed bedtime for persons living in a boarding school or staying in a hospital.

I always forget to turn the lights-out before leaving the house.

意味（1）

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

意味（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.