from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A sister to whom one is biologically related through one parent only.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The daughter of one's mother who has a different father, maternal half sister, uterine sister
  • n. The daughter of one's father who has a different mother, paternal 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"). (Wiktionary)


Sorry, no example sentences found.


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