from The American Heritage® Dictionary of the English Language, 5th Edition.
- interjection Used to express an acknowledgment of parting at night or of going to bed.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- phrase A
farewellsaid in the eveningor before going to sleep.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a conventional expression of farewell
from Wiktionary, Creative Commons Attribution/Share-Alike License
Probably a shortening of "May you have a good night."
Sorry, no example sentences found.