ge·​ol·​o·​gy | \ jē-ˈä-lə-jē How to pronounce geology (audio) \
plural geologies

Definition of geology

1a : 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

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Other Words from geology

geologist \ jē-​ˈä-​lə-​jist How to pronounce geologist (audio) \ noun

Examples of geology in a Sentence

learning about the geology of Hawaii
Recent Examples on the Web The journey continues with the process of assessing the conditions of the property – weather and climate, soil and geology, and air and water circulation. Sally Peterson, oregonlive, "Garden book review: ‘Spirit of Place: The Making of a New England Garden’," 5 July 2020 Lauret Savoy explores how the unfolding history and concept of race in the United States have marked her—as a historian and environmental studies and geology—and the land itself. Rachel King, Fortune, "10 books on American history that actually reflect the United States," 4 July 2020 Those volcanoes are a reminder that geology has the last word. Eliot Bush, Scientific American, "The Meaning of Time in the Place where Humanity's Earliest Ancestors Arose," 27 June 2020 The Addison couple couldn’t find Starburst candies to melt together for an at-home geology experiment. Dallas News, "COVID-19 pushes parents online for STEM resources," 23 June 2020 The many strong temblors are caused in part by the area’s complex geology—a furious collection of tectonic forces that primes Oaxaca for intense seismic activity. National Geographic, "Why the Oaxaca earthquake made buildings sway hundreds of miles away," 23 June 2020 Using its suite of scientific instruments, Perseverance will also study and characterize Mars' climate and geology. Ashley Strickland, CNN, "NASA's Perseverance rover will launch to Mars next month with a global tribute to health care workers," 20 June 2020 The museum features paleontology, Ordovician geology, ice age mammals, Native American history and the chronology of science at Big Bone. Charles Infosino,, "Strapped for cash? Check out these free family-friendly venues in Cincinnati," 16 June 2020 This is an actual topic of considerable debate in geology, with arguments going both ways. Scott K. Johnson, Ars Technica, "Plate tectonics vs. erosion—what sets the height of a mountain range?," 13 June 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'geology.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of geology

1735, in the meaning defined at sense 1a

History and Etymology for geology

New Latin geologia, from ge- + -logia -logy

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Time Traveler for geology

Time Traveler

The first known use of geology was in 1735

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Statistics for geology

Last Updated

8 Jul 2020

Cite this Entry

“Geology.” Dictionary, Merriam-Webster, Accessed 11 Jul. 2020.

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More Definitions for geology


How to pronounce geology (audio)

English Language Learners Definition of geology

: a science that studies rocks, layers of soil, etc., in order to learn about the history of the Earth and its life
: the rocks, land, processes of land formation, etc., of a particular area


ge·​ol·​o·​gy | \ jē-ˈä-lə-jē How to pronounce geology (audio) \

Kids Definition of geology

1 : a science that deals with the history of the earth and its life especially as recorded in rocks
2 : the geologic features (as mountains or plains) of an area

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More from Merriam-Webster on geology

Rhyming Dictionary: Words that rhyme with geology

Spanish Central: Translation of geology

Nglish: Translation of geology for Spanish Speakers

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