bye-bye
interjection
- a colloquial or informal way to say goodbye or farewell
Wiktionary
Pronunciation: /baɪˈbaɪ/ / /ˈbaɪbaɪ/ / /bəˈbaɪ/
intj
Etymology: Reduplication of bye.
- Goodbye.
“Bye bye! Let's play again some time!”
noun
Etymology: Reduplication of bye.
- A goodbye.
- Bedtime for a toddler, going to sleep, going to bed.
“Brush your teeth, it's time to go bye-bye.”
“"[H]e came to the gate of the city; and finding it shut lay him down and went to by-by!"”