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English definition of “half-sister”

half-sister

noun [C]     /ˈhɑːfˌsɪs.tər/ US  /ˈhæfˌsɪs.tɚ/
a sister who is the daughter of only one of your parentsFamily relations in general
(Definition of half-sister noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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