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
Their objectives have ranged from simply studying the geology of our closest planetary neighbor, to searching for signs of ancient past life.
—
Eric Lagatta, USA Today, 31 Mar. 2026
The moon may still appear full Tuesday and Thursday, said Noah Petro, chief of NASA’s planetary geology, geophysics and geochemistry laboratory at Goddard Space Flight Center in Greenbelt, Maryland.
—Lily Hautau, CNN Money, 31 Mar. 2026
Our journey culminates in a gathering around the ceremonial South Pole, candy-cane striped and flanked by international flags—the symbolic marker of where all lines of longitude meet (the geographic South Pole is several feet away and must be moved every year due to geology).
—Laura Dannen Redman, Robb Report, 29 Mar. 2026
Iran and Qatar are linked by geology.
—Shane Harris, The Atlantic, 26 Mar. 2026
See All Example Sentences for geology
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Eric Lagatta, USA Today, 31 Mar. 2026
The moon may still appear full Tuesday and Thursday, said Noah Petro, chief of NASA’s planetary geology, geophysics and geochemistry laboratory at Goddard Space Flight Center in Greenbelt, Maryland.
—Lily Hautau, CNN Money, 31 Mar. 2026
Our journey culminates in a gathering around the ceremonial South Pole, candy-cane striped and flanked by international flags—the symbolic marker of where all lines of longitude meet (the geographic South Pole is several feet away and must be moved every year due to geology).
—Laura Dannen Redman, Robb Report, 29 Mar. 2026
Iran and Qatar are linked by geology.
—Shane Harris, The Atlantic, 26 Mar. 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 6 Apr. 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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