[ interjection bahy-bahy; noun, adverb bahy-bahy ]
See synonyms for bye-bye on
  1. Informal. goodbye.

  1. Baby Talk. sleep.

Idioms about bye-bye

  1. go bye-bye, Baby Talk.

    • to leave; depart; go out.

    • to go to sleep; go to bed.

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

Words Nearby bye-bye Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use bye-bye in a sentence

  • bye-bye, Willie,” sang out Harvey, looking back and waving his cap derisively.

    The Rival Campers | Ruel Perley Smith
  • More than once she had left him with a laconic "bye-bye," and he had spent a miserable evening before an unsympathetic fire.

    The White Shield | Myrtle Reed
  • Prompted by Nanna, Jack screamed out: "bye-bye, mummy; come back happy."

    The Little Missis | Charlotte Skinner
  • bye-bye, Mamma, with your little cabin and your boys; some day you will have peace and plenty.

    Evening Round Up | William Crosbie Hunter
  • To live in the bye-bye Meadow was sometimes a dangerous thing, for all the big people lived there.