Half-sister meaning

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The definition of a half sister is a blood-sibling with whom you share one parent but not both.

An example of a half sister is the baby your mother has with her new husband after your dad has left.

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Alternative spelling of half sister.
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The daughter of one's mother who has a different father, maternal half sister, uterine sister.
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A sister to whom one is biologically related through one parent only.
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The daughter of one's father who has a different mother, paternal half sister.
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A sister through one parent only.
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Origin of half-sister

  • From Middle English half-süster, equivalent to half- +‎ sister. Compare Dutch halfzus, halfzuster (“half-sister”), German Halbschwester (“half-sister”), Swedish halvsyster (“half-sister”), Icelandic hálf-systir (“half-sister”).

    From Wiktionary