good-night

¹ American  

[good-nahyt] / ˌgʊdˈnaɪt /

noun

1. a farewell or leave-taking.

   He said his good-nights before leaving the party.

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good night ² American  

interjection

1. an expression of farewell used in parting at nighttime or when going to sleep.

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good night British  

1. a conventional expression of farewell, or, rarely, of greeting, used in the late afternoon, the evening, or at night, esp when departing to bed

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good night Idioms  

1. Expression of farewell used when parting at night or when going to sleep, as in He stood at the door, saying good night to each of the departing guests , or Mother came to tuck the children in and kiss them good night . [Late 1300s]

2. Exclamation of surprise or irritation, as in Good night, Joe!—You can't mean what you said , or Good night, Anne—it's time you learned how to throw a ball . [Late 1800s]

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Etymology

Origin of good night

Middle English word dating back to 1325–75

Example Sentences

To cap a good night for Barcelona fans, they celebrated in the stands when they heard rivals Real Madrid conceded a late goal against Benfica and would not finish in the top eight.

From Barron's

“I can give you some melatonin to help you relax and fall asleep. You’ll be surprised how much a good night’s sleep can help you.”

From Literature

But I don’t want to say good night! thought Owen.

From Literature

"When we play well, the people that come here are very happy. Today was a very good night here in the Bernabeu."

From Barron's

The researchers also observed brain activity patterns that resembled the effects of a good night's sleep, counteracting the typical brain changes associated with sleep deprivation.

From Science Daily