プログレッシブ和英中辞典(第３版)の解説
はいせん【敗戦】
(a) defeat
敗戦する｜be defeated in war [battle], lose a battle; 〔試合で〕lose a game [match]
敗戦国｜a defeated [vanquished] nation [country]
敗戦投手｜the losing pitcher