biology
noun
bi·ol·o·gy
bī-ˈä-lə-jē 
1
: a branch of knowledge that deals with living organisms and vital processes
advances in the field of biology
a biology textbook
2
a
: the plant and animal life of a region or environment
the biology of the rainforest
b
: the life processes especially of an organism or group
the biology of cancer cells
broadly
: ecology
Examples of biology in a Sentence
advances in the field of biology
the biology of the rain forest
the biology of tumor cells
Recent Examples on the Web
This Was About Fairness, Not Identity From the beginning, USA Powerlifting has argued that its policy is rooted in biology, not gender identity.
—
Amber Harding Outkick, FOXNews.com, 28 Apr. 2026
This resembled the predator-prey systems seen in biology.
—Ameya Paleja, Interesting Engineering, 27 Apr. 2026
That means native bighorns are outnumbered by a wide margin, and basic biology is driving the gap wider.
—Hanna Wickes, Miami Herald, 27 Apr. 2026
The biology makes the imbalance worse.
—Hanna Wickes, Kansas City Star, 27 Apr. 2026
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Amber Harding Outkick, FOXNews.com, 28 Apr. 2026
This resembled the predator-prey systems seen in biology.
—Ameya Paleja, Interesting Engineering, 27 Apr. 2026
That means native bighorns are outnumbered by a wide margin, and basic biology is driving the gap wider.
—Hanna Wickes, Miami Herald, 27 Apr. 2026
The biology makes the imbalance worse.
—Hanna Wickes, Kansas City Star, 27 Apr. 2026
See All Example Sentences for biology
Cite this Entry
“Biology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biology. Accessed 30 Apr. 2026.
Copy CitationKids Definition
biology
noun
bi·ol·o·gy
bī-ˈäl-ə-jē
1
: a branch of knowledge that deals with living organisms and life processes
2
a
: the plant and animal life of a region or environment
b
: the life processes of an organism or group
Etymology
from German Biologie "biology," derived from Greek bi-, bio- "life" and -logia "study, science"
Medical Definition
biology
noun
bi·ol·o·gy
-jē
plural biologies
1
: a branch of science that deals with living organisms and vital processes
2
a
: the plant and animal life of a region or environment
b
: the laws and phenomena relating to an organism or group
3
: a treatise on biology
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