behavior 2023.03.13 behaviorとは 意味・定義・例文 Noun 名詞 ビヘイヴャ US /bɪˈheɪvjər/ UK /bɪˈheɪvjə/ 1. the way that someone behaves 行動, 振る舞い, 態度 Behavior is a mirror in which everyone shows his image.