biological parent

NOUN

birth mother or father

Synonyms

WEAK

biological father biological mother birth father birth mother birth parent father mother natural parent

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

One of the oldest laws of parentage is the “marital presumption,” which automatically establishes a birth mother’s husband as the presumptive legal father, even if he is not a biological parent.

From Slate • May 13, 2026

New documents in a lawsuit against Priscilla Presley’s son include claims that Elvis Presley’s granddaughter Riley Keough is the biological parent of John Travolta and the late Kelly Preston’s youngest child, Benjamin.

From Los Angeles Times • Dec. 18, 2025

IVF clinics had voluntarily started to end anonymous donations, meaning any children would eventually be given the name of their biological parent.

From BBC • Nov. 19, 2025

It is however possible for an adult who is not the biological parent to obtain parenting rights through a special adoption procedure.

From Reuters • Jun. 22, 2023

The milk doesn’t have to be from a biological parent: Unlike blood or bone marrow, there are no biological markers in donated breast milk that limit who can receive it.

From Seattle Times • Mar. 30, 2023