グッドバイalso: グッバイグッドバイMeanings1expressiongoodbyeA casual parting expression borrowed from English. Used in informal settings, often with a light or friendly tone.じゃあ、また明日あした。グッドバイ！Well then, see you tomorrow. Goodbye!彼かれは手てを振ふりながら「グッバイ」と言いった。He waved his hand and said 'goodbye'.
