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Glite Dictionary
birth mother

birth mother

50 3.6
A woman who has a baby but is not the child's legal or social mother
  • noun
  • /bɜrθ ˈmʌðər/
translation icon : madre biológica
  • The Division is seeking to terminate the birth mother's parental rights in order to free D for adoption.
  • birth mother and adoptive parents
  • birth mother in adoption
  • birth mother's family

And I've seen this even in identical twins brought up by their birth mother.

Examples

  • Questions of her racial identity become even more vexing when she receives information about her birth mother.

    Academic text (2014)

  • I have to meet my birth mother.

    Spinal Tap II: The End Continues (2025)

  • Well, I wanna know who my birth mother is.

    October Baby (2011)

  • The law views her as the birth mother.

    When the Bough Breaks (2016)

  • To lose one's birth mother is to lose the very foundation on which we stand.

    The Brutalist (2024)

  • If we could locate his birth mother, maybe she could talk to him, too.

    Fiction book (1995)

  • Mordecai seems desperate to know who his birth mother is.

    Fiction book (1995)

  • Sabrina uncovers letters from her birth mother while Kate gets a dose of reality.

    Blog text (23)

  • Despite some difficulties in caring for a newborn without the birth mother, Nan and Elton Rice adapted well to the situation.

    Fiction book (2001)

  • Many adopted children hope to find their birth mother one day.

Synonyms

surrogate mother
vsbirth mother
11 4.3

A woman who becomes pregnant to have a baby for another person or couple

is the woman who delivers the child biologically but is not the legal parent

How Parental

birth mother
50 3.6
foster mother
14 3.0
caregiver
  • US
79 3.2
babysitter
234 1.0

Surface Forms

birth mother singular
birth mothers plural

Morphology

birth + mother

The meaning is directly and transparently built from 'birth' (the event of being born) + 'mother' (female parent), so a B1 learner who knows both words will infer it refers to the woman who gave birth to the child. While the term often signals the contrast with a legal or adoptive mother, that pragmatic nuance does not prevent basic compositional understanding.

Etymology

Birth mother comes from the simple image of a woman who gives birth: birth, the act of having a baby, and mother, the woman who had the baby. So, birth mother is used today to mean the mother who actually gave birth to the child, not the child's 'legal or adoptive mother'.