Definition

Noun: - A female who is raised by one's parents but is not their biological or adopted daughter: A foster sister is a girl or woman who shares your parental guardians because she is being brought up by your parents, though she is not related to you by blood or legal adoption. This relationship is formed through foster care.

Usage

• This term specifically describes the familial relationship created by foster care. It is used to denote a sisterly bond based on shared upbringing rather than biological kinship.
• It is a compound noun. The primary term is "foster sister." The word "foster" modifies "sister" to specify the type of sisterly relationship.

Examples

Advanced Usage

• The term can be used in legal, social work, and personal contexts to accurately describe a family structure.
• The relationship is distinct from that with a stepsister (connected by parental marriage) or an adoptive sister (connected by legal adoption).

Variants and Related Words

• Foster brother (n): A male who is raised by one's parents but is not their biological or adopted son.
• Foster child (n): A child raised by someone who is not their biological or adoptive parent.
• Foster parent (n): A person who acts as a parent to a child not their own, typically as part of a formal system.

Synonyms

• Non-biological sister: A general term emphasizing the lack of genetic relation.
• Ward (in a familial context): A person, especially a child, placed under the protection of a guardian. (Note: This is a less direct synonym and does not convey the sisterly bond.)

Antonyms

• Biological sister: A female sibling sharing one or both genetic parents.
• Adoptive sister: A female sibling related through legal adoption.

Noun

1. your foster sister is a female who is not a daughter of your parents but who is raised by your parents