nighty-night
American
[nahy-tee-nahyt]
/ ˈnaɪ tiˈnaɪt /
interjection
Informal.
Etymology
Origin of nighty-night
1875–80; reduplication of ( good ) night; see -y 2
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
