An example of a half sister is the baby your mother has with her new husband after your dad has left.
(plural half sisters)
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”).
- Alternative spelling of half sister.