• Bye-bye

    Origin

    From bye, goodbye.

    Interjection

    bye-bye
    1. (informal, often childish) Goodbye.

    Full definition of bye-bye

    Noun

    bye-bye

    (plural bye-byes)
    1. (colloquial, often childish) A goodbye.
    2. (colloquial, often childish) bedtime for a toddler, going to sleep, going to bed.

    Synonyms

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