（通常为儿语或对孩子说的）晚安
used as another way of saying good night, usually by or to children
"Night-night, Daddy." "Good night, honey. Sleep well!"
"Night-night, Jacob. Sweet dreams." "Night-night, Grandma."
"Can I have another story, Daddy?" "No, honey - it's late. Time for night-night."
I've just come up to say night-night, sweetheart. Sleep well!
"I'm going to turn the light out, okay? Night-night, darling." "Night-night!"
See also: night noun (EVENING)