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
On the right, many pointed to Robinson's personal relationship with his roommate, who court documents say is a biological male in the process of transitioning genders.
—
Geoff Brumfiel, NPR, 20 Sep. 2025
Daniel was believed to have been fostered for the first 18 months of his life, before being returned to his biological family, the outlet noted.
—Becca Longmire, PEOPLE, 19 Sep. 2025
This evidence further highlights that the extraordinary bond dogs share with humans is deeply biological, shaped by thousands of years of evolution favoring social attentiveness and cooperation.
—Scott Travers, Forbes.com, 19 Sep. 2025
Food influences key biological pathways such as blood sugar and insulin sensitivity, chronic inflammation, immune and metabolic function and the gut microbiome.
—Chrystle Fiedler, USA Today, 19 Sep. 2025
See All Example Sentences for biological
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Geoff Brumfiel, NPR, 20 Sep. 2025
Daniel was believed to have been fostered for the first 18 months of his life, before being returned to his biological family, the outlet noted.
—Becca Longmire, PEOPLE, 19 Sep. 2025
This evidence further highlights that the extraordinary bond dogs share with humans is deeply biological, shaped by thousands of years of evolution favoring social attentiveness and cooperation.
—Scott Travers, Forbes.com, 19 Sep. 2025
Food influences key biological pathways such as blood sugar and insulin sensitivity, chronic inflammation, immune and metabolic function and the gut microbiome.
—Chrystle Fiedler, USA Today, 19 Sep. 2025
See All Example Sentences for biological
Cite this Entry
“Biological.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biological. Accessed 21 Sep. 2025.
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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share