Noun
A sister by one parent only.
Source: Webster's dictionaryhalf sister
Their daughter, who would be the half-sister of Alexander the Great and, later the wife of Cassander, was appropriately named Thessalonike, to commemorate Philip's victory in Thessaly. In 315 Cassander founded at or near the site of ancient Therme the great city that still bears her name. Eugene N. Borza
My brother thinks it is very, very bad that I left Islam. My half-sister wants to convert me back; I want to convert her to Western values. My mum is terrified that when I die, and we all go to God, I will be burned. Ayaan Hirsi Ali
According to reports, a second person in the family might soon be next, as in February of this year, Angolan investigators froze assets of Zenu’s half-sister, who is allegedly the richest woman in African. Source: Internet
Although BoJack is initially reluctant to embrace his half-sister, he eventually realizes how much he cares for her. Source: Internet
Al-Attas married Hamida in the late 1950s or early 1960s, and they are still together. citation The couple had four children, and bin Laden lived in the new household with three half-brothers and one half-sister. Source: Internet
Also in 1157, on the death of patriarch Fulcher, Melisende, her half-sister Sibylla of Flanders, and Ioveta the Abbess of Bethany, had Amalric of Nesle appointed as patriarch of Jerusalem. Source: Internet