Definition of night-cellar in US English:

night-cellar

noun

historical
  • A cellar open during the night as a (usually disreputable) tavern or meeting-place.

Origin

Early 18th century; earliest use found in Richard Savage (?1698–1743), poet and playwright. From night + cellar.

Pronunciation

night-cellar

/ˈnʌɪtˌsɛlə/