Interjection (kandoushi)
bye-bye; goodbye
Colloquial
診察室を出る間際、先生が「バイバイ」と手を振ってくださいました。Just as we were leaving the exam room the doctor waved his hand saying, 'bye-bye'. Noun, Suru verb, Intransitive verb
saying goodbye; parting
Colloquial
Also written バイ・バイ