Meanings
Synonyms & antonyms
nounyour foster sister is a female who is not a daughter of your parents but who is raised by your parents
Similar
foster-sister
Broader
femalefemale person
Synonym sets from Open English WordNet, CC BY 4.0.
Cite this entry
APA
foster sister. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/foster%20sister
MLA
“foster sister.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/foster%20sister. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “foster sister,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/foster%20sister.
Source: foster sister on Wiktionary, CC BY-SA 4.0.