half-sister
US /ˈhæfˌsɪs.tər/
UK /ˈhæfˌsɪs.tər/
1.
同父异母的姐妹, 同母异父的姐妹
a sister with whom one shares only one parent
:
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My half-sister and I have the same mother but different fathers.
我的同母异父的姐姐和我是同一个母亲，但父亲不同。
•
She grew up with her half-sister after their parents remarried.
父母再婚后，她和同父异母的妹妹一起长大。