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half-sister [noun]
a sister who is the daughter of only one of your parents
US
/ˈhæfˌsɪs.tɚ/
UK
/ˈhɑːfˌsɪs.tər/
Example:
She is my half sister.
Shortened URL:
a sister who is the daughter of only one of your parents
She is my half sister.