柯林斯詞典waistcoat /?we?s?k??t, ?w?sk?t/ (waistcoats) 1. N-COUNT A waistcoat is a sleeveless piece of clothing with buttons that people usually wear over a shirt. (西裝) 背心; 馬甲[英國英語] 返回 waistcoat劍橋詞典a piece of clothing that covers the upper body but not the arms and usually has buttons down the front , worn over a shirt 西服背心；馬甲 返回 waistcoat