biological
adjective
bi·o·log·i·cal
ˌbī-ə-ˈlä-ji-kəl 
variants
or less commonly biologic
1
: of or relating to biology or to life and living processes
2
: used in or produced by applied biology
3
: connected by direct genetic relationship rather than by adoption or marriage
her biological father
Examples of biological in a Sentence
the rights of the biological father in this case
Recent Examples on the Web
Some of them are biological, some adopted, some fostered – but Babineaux-Fontenot won't tell you which is which.
—
Lee Cowan, CBS News, 8 Mar. 2026
Slusser had just assumed Fleming was just a very strong and talented biological female at that time.
—Jackson Thompson, FOXNews.com, 8 Mar. 2026
Many issues can arise in blended or non-traditional families because laws tend to favor nuclear, biological and marital relationships, and often exclude stepchildren and unmarried partners.
—Medora Lee, USA Today, 8 Mar. 2026
The poll surveyed 977 caregivers of children 13 and younger, including 53% biological mothers and 33% biological fathers, with the remaining participants including stepparents, grandparents, aunts and uncles.
—Lily Hautau, CNN Money, 5 Mar. 2026
See All Example Sentences for biological
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Lee Cowan, CBS News, 8 Mar. 2026
Slusser had just assumed Fleming was just a very strong and talented biological female at that time.
—Jackson Thompson, FOXNews.com, 8 Mar. 2026
Many issues can arise in blended or non-traditional families because laws tend to favor nuclear, biological and marital relationships, and often exclude stepchildren and unmarried partners.
—Medora Lee, USA Today, 8 Mar. 2026
The poll surveyed 977 caregivers of children 13 and younger, including 53% biological mothers and 33% biological fathers, with the remaining participants including stepparents, grandparents, aunts and uncles.
—Lily Hautau, CNN Money, 5 Mar. 2026
See All Example Sentences for biological
Cite this Entry
“Biological.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biological. Accessed 11 Mar. 2026.
Copy CitationMedical Definition
biological
adjective
variants
also biologic
1
: of or relating to biology or to life and living processes
2
: used in or produced by applied biology
3
: related by direct genetic relationship rather than by adoption or marriage
an adoptee who searched for years for her biological parents
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