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English definition of “sister”

sister

noun [C]    /ˈsɪs·tər/
a female who has the same parents as another person : an older / younger sister A sister is also a woman who is a member of the same race , church , religious group , or organization as others : a sorority sister Sister may be used as a form of address to a woman.
(Definition of sister noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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