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Meaning of bye-bye

bye-bye

Pronunciation: (interj.bī'bī'n., adv.bī'bī&sec), [key]
— interj.
  1. good-bye.
—n.
  1. sleep.
—adv.
    1. to leave; depart; go out.
    2. to go to sleep; go to bed.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.