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⇱ BIOLOGICAL Definition & Meaning - Merriam-Webster

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Synonyms of biological👁 next
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

Synonyms of biological

Examples of biological in a Sentence

the rights of the biological father in this case
Recent Examples on the Web
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.
Their research couldn’t prove that the same biological process happens in humans, DeGregori said. —👁 Image
Los Angeles Times, 15 June 2026 Measured across multiple DNA methylation clocks, her biological age came in at an average of 17 to 23 years younger than her chronological age. —👁 Image
Allison Palmer, Fort Worth Star-Telegram, 15 June 2026 Radical Numerics is instead betting that the bottleneck in drug development is about failing to understand an entire biological system. —👁 Image
Lily Mae Lazarus, Fortune, 15 June 2026 There are biological contaminants, and that’s anything that’s a living organism. —👁 Image
Kat Tretina, Charlotte Observer, 15 June 2026 See All Example Sentences for biological

Word History

First Known Use

1818, in the meaning defined at sense 1

Time Traveler
The first known use of biological was in 1818

Phrases Containing biological

Rhymes for biological

Browse Nearby Words

Cite this Entry

“Biological.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biological. Accessed 17 Jun. 2026.

Kids Definition

biological

adjective
bi·​o·​log·​i·​cal
ˌbī-ə-ˈläj-i-kəl
variants also biologic
-ˈläj-ik
1
: of or relating to biology or to life and living things
2
: connected by a relationship involving heredity rather than by one involving adoption or marriage
his biological father
biologically
-ˈläj-i-k(ə-)lē
adverb

Medical 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

More from Merriam-Webster on biological

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