Bye-bye

//baɪˈbaɪ// intj, noun, slang

intj, noun, slang ·Moderate ·High school level

Definitions

Noun
  1. 1
    A goodbye. childish, colloquial, often
  2. 2
    a farewell remark wordnet
  3. 3
    Bedtime for a toddler, going to sleep, going to bed. childish, colloquial

    "Brush your teeth, it's time to go bye-bye."

Intj
  1. 1
    Goodbye. childish, informal, often

    "Bye bye! Let's play again some time!"

Example

More examples

"Just as we were leaving the exam room the doctor waved his hand saying, 'bye-bye'."

Etymology

Reduplication of bye.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.