Night night
Definition 1 of 1
Pro Tip 1/3Child-Friendly
Often used with kids by caregivers as a comforting bedtime phrase. 
After reading a story, dad said 'night night' and tucked Jamie in.
Pro Tip 2/3Casual Farewell
Used informally among friends or family to say goodbye in the evening. 
As she left the family gathering, Ana waved saying, 'night night everyone!'
Pro Tip 3/3Endearing Tone
Carries a warm, affectionate feel, like a verbal hug. 
Grandma gave a gentle smile and whispered 'night night, sweetheart.'