Dictionary.com
Thesaurus.com

nighty-night

American  
[nahy-tee-nahyt] / ˈnaɪ tiˈnaɪt /

interjection

Informal.
  1. good night.


Etymology

Origin of nighty-night

1875–80; reduplication of ( good ) night; -y 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

When you tuck your children in, the feds are there for the nighty-night, too.

From Seattle Times

The full tweet read: “Supposed to be airborne in 10 minutes. Nighty-night, baby. I love you.”

From Washington Times

The full tweet read: “Supposed to be airborne in 10 minutes. Nighty-night, baby. I love you.”

From Washington Times

The full tweet read: “Supposed to be airborne in 10 minutes. Nighty-night, baby. I love you.”

From Seattle Times

Nighty-night: The Atlantic pulls back the covers on sleep — specifically, why is it necessary?

From Los Angeles Times