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
Called ZefERO, the mission would launch in 2032, study Martian geology and atmosphere, and serve as a communication relay for rovers on the Red Planet's surface.
—
Tereza Pultarova, Space.com, 2 Dec. 2025
Experts say determining whether sinking slowly continues or stabilizes could dictate whether the industry needs to rethink its lofty ambitions or find new ways to anchor seaside towers — not just on Sunny Isles Beach but in other coastal communities that share similar inherently unstable geology.
—Denise Hruby, Miami Herald, 1 Dec. 2025
The trail starts at a small parking area with signs that explain the park’s geology and history, then winds through desert terrain dotted with junipers, shrubs, and sandstone.
—Taryn White, Travel + Leisure, 25 Nov. 2025
The Santa Rosa region’s unique geology—clay soils and sedimentary basins—can amplify ground shaking, according to USGS research.
—Hollie Silverman, MSNBC Newsweek, 24 Nov. 2025
See All Example Sentences for geology
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Tereza Pultarova, Space.com, 2 Dec. 2025
Experts say determining whether sinking slowly continues or stabilizes could dictate whether the industry needs to rethink its lofty ambitions or find new ways to anchor seaside towers — not just on Sunny Isles Beach but in other coastal communities that share similar inherently unstable geology.
—Denise Hruby, Miami Herald, 1 Dec. 2025
The trail starts at a small parking area with signs that explain the park’s geology and history, then winds through desert terrain dotted with junipers, shrubs, and sandstone.
—Taryn White, Travel + Leisure, 25 Nov. 2025
The Santa Rosa region’s unique geology—clay soils and sedimentary basins—can amplify ground shaking, according to USGS research.
—Hollie Silverman, MSNBC Newsweek, 24 Nov. 2025
See All Example Sentences for geology
Cite this Entry
“Geology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geology. Accessed 10 Dec. 2025.
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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