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good night

good night

77 1.0
A polite phrase for saying goodbye in the evening before sleep
  • noun
  • /ɡʊd naɪt/
translation icon : buenas noches
  • You have a good night now, you hear.
  • say good night
  • a good night kiss
  • thank you and good night

OK, well, have a good night.

Examples

Synonyms

goodbye
vsgood night
1.0

Words people say when they leave each other

is used specifically in the evening or before sleep rather than all partings
bye-bye
vsgood night
  • Informal
279 1.1

A friendly informal way to say goodbye when leaving

is specific to evening or before sleep rather than any farewell
farewell
vsgood night
199 1.9

A speech or action that says goodbye and wishes someone well

is a polite everyday evening parting phrase rather than a formal expression
good-by
vsgood night
50 4.4

Words or actions people use when they leave each other

is the evening or before sleep farewell rather than any goodbye
to have a good one
vsgood night
  • Informal
15 6.3

Wish someone a nice day or a good time as a friendly goodbye

is used for evening or sleep farewells rather than general well wishes
goodnight
vsgood night
9 1.0

To wish someone a good night before they go to sleep

is identical in meaning but written as two separate words
nighty night
vsgood night
  • Baby Talk
3 8.1

A friendly way to say good night to someone before sleep, often to children

is the polite conventional form rather than a childish phrase
night night
vsgood night
  • Baby Talk
2 6.0

A friendly short phrase to say to someone before they go to sleep

is more formal and conventional, not specifically affectionate
beddy-bye
vsgood night
  • Baby Talk
2 9.1

The time when a child goes to bed to sleep

is a polite conventional farewell rather than a childish bedtime word
nite
vsgood night
  • Informal
8.2

A casual way to say goodbye at the end of the day

is the polite conventional spoken form rather than informal writing

How Friendly

sweet dreams
  • Informal
1.4
nighty night
  • Baby Talk
3 8.1
sleep of the just
  • Literature
1 8.4
good night
77 1.0

Surface Forms

good night singular
good nights plural

Morphology

good + night

The phrase 'good night' is directly compositional: 'good' modifies 'night' to express a wish for a pleasant night, which naturally yields a farewell/goodwish meaning for bedtime. This pattern is frequent across languages (e.g. buenas noches, bonne nuit) and follows a standard adjective+noun wishing construction, so a B1 learner who knows both words will readily understand it.

Etymology

Good night may come from an older wish like 'God give you a good night.' The words good and night simply mean a 'pleasant night', and people used the short phrase when leaving someone in the evening, so it became a polite way to say 'goodbye' at night.