geology
noun
ge·ol·o·gy
jē-ˈä-lə-jē 
plural geologies
1
a
: a science that deals with the history of the earth and its life especially as recorded in rocks
b
: a study of the solid matter of a celestial body (such as the moon)
2
: geologic features
the geology of Arizona
3
: a treatise on geology
Examples of geology in a Sentence
learning about the geology of Hawaii
Recent Examples on the Web
Southeast Asia’s karst regions remain relatively underexplored, and the combination of complex geology and tropical climate means the pipeline of new species from this part of the world shows no signs of slowing.
—
Ryan Brennan, Charlotte Observer, 25 Feb. 2026
These different geologies have a bearing on what types of geothermal systems are feasible.
—Jan Ellen Spiegel, Hartford Courant, 23 Feb. 2026
Hike one of the many trails, and stop at the Ben Reifel Visitor Center to learn more about the park's history, wildlife, and geology.
—Patricia Doherty, Travel + Leisure, 19 Feb. 2026
In a city, the first 100 meters (328 feet) of earth act as a thermal sponge, soaking up heat from human activity—what Philipp Blum, a professor of engineering geology at Germany’s Karlsruhe Institute of Technology, calls the subsurface urban heat island.
—Vanessa Bates Ramirez, Scientific American, 18 Feb. 2026
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Ryan Brennan, Charlotte Observer, 25 Feb. 2026
These different geologies have a bearing on what types of geothermal systems are feasible.
—Jan Ellen Spiegel, Hartford Courant, 23 Feb. 2026
Hike one of the many trails, and stop at the Ben Reifel Visitor Center to learn more about the park's history, wildlife, and geology.
—Patricia Doherty, Travel + Leisure, 19 Feb. 2026
In a city, the first 100 meters (328 feet) of earth act as a thermal sponge, soaking up heat from human activity—what Philipp Blum, a professor of engineering geology at Germany’s Karlsruhe Institute of Technology, calls the subsurface urban heat island.
—Vanessa Bates Ramirez, Scientific American, 18 Feb. 2026
See All Example Sentences for geology
Cite this Entry
“Geology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geology. Accessed 28 Feb. 2026.
Copy CitationKids Definition
geology
noun
ge·ol·o·gy
jē-ˈäl-ə-jē
plural geologies
1
a
: a science that deals with the history of the earth and its life especially as recorded in rocks
b
: a study of the features of a heavenly body (as the moon)
2
: the geologic features (as mountains or plains) of an area
geologic
adjective
ˌjē-ə-ˈläj-ik
or geological
-i-kəl
geologically
adverb
-i-k(ə-)lē
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