good night

/ɡʊd ˈnaɪt/

farewell before sleep

Good night, see you tomorrow.

A wish for a pleasant sleep before parting.

informal

A polite expression used to wish someone a restful sleep or to say goodbye at night.

She waved and said, "Good night!"

She wished him a pleasant sleep as she left.

Often said before going to bed; can also serve as a simple evening goodbye.

Collocations

good night wishesexpressions of hope for a pleasant sleepgood night kissa kiss given when saying good night

a greeting used in the early night hours

a wish for pleasant dreams

From Old English 'gōd' meaning 'favorable' and 'night' from Old English 'niht', combined as a courteous parting phrase.

Used when parting in the evening or before bedtime; not typical in formal written correspondence.

English Dictionary