Dictionary.com
Thesaurus.com
Synonyms

bye-bye

American  
[bahy-bahy, bahy-bahy] / ˈbaɪˈbaɪ, ˈbaɪˌbaɪ /

interjection

  1. Informal. goodbye.

noun

  1. Baby Talk. sleep.

idioms

  1. go bye-bye,

    1. to leave; depart; go out.

    2. to go to sleep; go to bed.

Etymology

Origin of bye-bye

1700–10; apparently originally nursery phrase used to lull a child to sleep, later construed as reduplicative form of bye, short for goodbye

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.

So now, in hilariously pathetic fashion, the politicians responsible for this state of affairs are finally beginning to rethink some things, just days before TikTok U.S. is set to go bye-bye.

From Slate • Jan. 17, 2025

Newton then waved bye-bye to a Villanova student section that taunted him all game.

From Seattle Times • Jan. 20, 2024

It was soon bye-bye Braves - once again an October departure in Philly.

From Washington Times • Oct. 13, 2023

"We are not asking you to run a marathon, we are just asking you to sit down, listen to us for a couple of minutes, get a jab and bye-bye and thank you very much."

From BBC • Dec. 26, 2022

"No? . . . Okay, I'll keep thinking. Okay. Love you. Okay, bye-bye."

From "Eleanor & Park" by Rainbow Rowell

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.