boyfriend 2023.03.13 boyfriendとは 意味・定義・例文 Noun 名詞 ボイフれンド US /ˈbɔɪˌfrɛnd/ UK /ˈbɔɪˌfrɛnd/ 1. the male friend that someone is having a romantic relationship with ボーイフレンド I am out of a boyfriend now.