buoy 2023.03.13 buoyとは 意味・定義・例文 Noun 名詞 ブーイ US /ˈbui/ UK /bɔɪ/ 1. a thing that floats in the sea to warn ships or boats of dangerous rocks or to show them where to go ブイ, 浮標, 救命浮標 mark with a buoy