Taps
Part of speech: noun
Definition: A song played at the end of the day, and at military funerals. A tapering cylindrical pin or peg used to stop the vent in a cask.
Part of speech: verb
Definition: To furnish with taps.
Lights-out
Part of speech: noun
Definition: 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.