Definition

1. Noun:
   • A female who is raised as one's sibling but is not biologically related: A foster-sister is a girl or woman who is brought up by the same parents or guardians as another child, though they are not connected by blood or legal adoption. The relationship is formed through the act of fostering.

Usage

• The term "foster-sister" is used to specify a familial relationship created through care and cohabitation rather than biology. It is a compound noun where "foster" modifies "sister" to indicate the nature of the sibling bond.
• It is typically used in contexts discussing family structure, upbringing, or personal history.

Examples

• Noun:
  • Although we are not related by blood, I consider her my foster-sister because we were raised together from a young age.
  • She introduced me to her foster-sister, explaining they had shared a room for ten years.

Advanced Usage

• The term can be used in legal or social work contexts to describe relationships within a foster care system.
• It may appear in biographical or narrative writing to clarify complex family dynamics.

Variants and Related Words

• Foster brother (n): A male who is raised as one's sibling but is not biologically related.
• 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 they are not biologically related to, often temporarily.
• Foster family (n): A household where one or more foster children are raised.

Synonyms

• Non-biological sister: A sister not related by birth.
• Ward (in some historical/legal contexts): A person, especially a child, placed under the protection of a guardian.

Antonyms

• Biological sister: A sister related by blood.
• Adoptive sister: A sister related through legal adoption.

Notes

• The term is hyphenated: "foster-sister." The relationship is based on shared upbringing and care, not legal ties (unless formal adoption occurs later).
• The concept emphasizes the social and emotional bond of sisterhood formed through living as a family unit.

Noun

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