goodnight

exclamation
🔊/ˌɡʊdˈnaɪt/
🔊/ˌɡʊdˈnaɪt/
(also good night)
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  1. used when you are saying goodbye to somebody late in the evening, or when they or you are going to bed; in informal use people often just say Night(晚间道别时或睡前用语)晚安(非正式场合常说 Night)