A farewell said in the evening or before going to sleep. / (colloquial, dated) Expressing incredulity.

To utter the farewell “good night”.

Alternative form of goodnight Vienna

(rare) plural of good night's sleep

(nonstandard) plural of good night's sleep

(colloquial) A period of good sleep during a particular night.

Implies that somebody died.

(euphemistic) To die without protest.