Definition of night night
- "Night night, dear." "Nighty night, Mommy."
: the time from dusk to dawn when no sunlight is visible
: an evening or night taken as an occasion or point of time
: an evening set aside for a particular purpose
: of, relating to, or associated with the night
: intended for use at night
: existing, occurring, or functioning at night
What made you want to look up night night? Please tell us where you read or heard it (including the quote, if possible).