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good night

idiom · good-night idiom

3 meanings of good night

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  1. 1
    idiom
    What you say to someone when you leave them in the evening or go to bed.

    Good night, Mom! See you in the morning.

    The kids kissed Grandma good night and ran upstairs.

    Note
  2. 2
    idiom · good-nighttransitive or intransitive
    To say good night to someone.

    Mom came in to good-night us and turn off the lamp.

    The girls good-nighted at the bus stop and walked off in different directions.

    Note
  3. 3
    disbeliefidiomdated
    Said when you can hardly believe something.

    "Good night! You ate the whole pizza by yourself?"

    "Oh, good night, not again!" he said when the car would not start.

    Note

Practice

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Origin

Probably a short way of saying "May you have a good night".