good night /ɡʊd ˈnaɪt/phrase 2good-night verb 1forms 3 phrase2 •A farewell said in the evening or before going to sleep. •(informal) Expressing incredulity.Together they pried into the sodden mass, yanking out what was left of the record books. "Oh, good night!" Joe moaned in dismay. "The fire extinguisher liquid has messed up what the fire didn't." — 1954 good-night verb1 •To utter the farewell “good night” to (somebody).And he didn’t say another word until he good-nighted at the gate. — 1920 formsgood-nighted · good-nighting · good-nights