good night

1. 1.

   a conventional expression of farewell

   Broaderfarewell

Questions about good night

What does good night mean?

good night means "a conventional expression of farewell".

Is good night a common word?

good night is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.