[interjection nahyt-nahyt, -nahyt; adverb nahyt-nahyt]
- Informal. good night.
- go night-night, Baby Talk. to go to bed or to sleep.
Origin of night-night
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for night-night
And ''night-night' and 'daddy' were two-year-old language to Jim.Joe Wilson and His Mates
Night-night, echoed Ted, as he wiggled his fingers in a funny fashion at Trouble.The Curlytops at Silver Lake
Howard Roger Garis
"Just a little peep at dainty Miss Mission, to say night-night," he smiled, unfastening the catch on the chronometer case.Gold Out of Celebes
Aylward Edward Dingle
- an informal word for good night
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for night-night
nursery talk, "good-night," 1896; form nighty-night is attested from 1876.
Online Etymology Dictionary, © 2010 Douglas Harper