柯林斯詞典half sister (half sisters) 1. N-COUNT Someone's half sister is a girl or woman who has either the same mother or the same father as they have. 同母異父姐妹; 同父異母姐妹 返回 half-sister劍橋詞典a sister who is the daughter of only one of your parents 同父異母（或同母異父）的姐妹 返回 half-sister