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
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
These samples, and the 1,300 other core samples of geology from across the state are all housed at the university and can be analyzed by scientists and companies interested in finding out what might be in Iowa’s subsurface.
—Cami Koons, Iowa Capital Dispatch, 17 Feb. 2026
Scientists believe the geology of Mars may hold valuable clues about past ancient life, and so the robotic vehicles, controlled remotely from Earth, have slowly navigated the rocky terrain to scoop up and collect intriguing samples.
—Eric Lagatta, USA Today, 17 Feb. 2026
Campfire Circles The campground hosts evening programs on local flora, fauna, and geology.
—Carrie Honaker, Travel + Leisure, 15 Feb. 2026
See All Example Sentences for geology
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Vanessa Bates Ramirez, Scientific American, 18 Feb. 2026
These samples, and the 1,300 other core samples of geology from across the state are all housed at the university and can be analyzed by scientists and companies interested in finding out what might be in Iowa’s subsurface.
—Cami Koons, Iowa Capital Dispatch, 17 Feb. 2026
Scientists believe the geology of Mars may hold valuable clues about past ancient life, and so the robotic vehicles, controlled remotely from Earth, have slowly navigated the rocky terrain to scoop up and collect intriguing samples.
—Eric Lagatta, USA Today, 17 Feb. 2026
Campfire Circles The campground hosts evening programs on local flora, fauna, and geology.
—Carrie Honaker, Travel + Leisure, 15 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 19 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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