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 geology (audio) \ noun

Examples of geology in a Sentence

learning about the geology of Hawaii
Recent Examples on the Web Now, Perseverance is set to continue work characterizing climate and geology and collecting and caching rock and sediment. Julia Musto, Fox News, 2 June 2021 The mission began with the goals of determining if conditions on Mars ever supported life as well as characterizing the Martian climate and geology. Ashley Strickland, CNN, 2 June 2021 The research, published in the journal Royal Society Open Source, used multi-isotope analysis of crew members’ teeth to identify evidence about the climate and geology of their homelands, as well as their childhood diets. Livia Gershon, Smithsonian Magazine, 5 May 2021 The rover is seeking signs of past microbial life and will document the planet’s climate and geology. Emily Goodykoontz, Anchorage Daily News, 20 Feb. 2021 Learning about cell division or the ins and outs of geology might not necessarily be thrilling, and a book series with the goal of improving science education for underrepresented groups could easily become dull. Goldie Chan, Forbes, 27 May 2021 Picking up the study of geology at the university, Solano‐Rojas met geophysicist Enrique Cabral-Cano, who was actually researching the surprising reason for that infrastructural chaos: The city was sinking—big time. Matt Simon, Wired, 17 May 2021 The local geology is perfectly suited for long-duration carbon sequestration. Brentan Alexander, Forbes, 28 Apr. 2021 The same geology that makes the formations in Arches National Park possible has created a trove of Cretaceous era fossils, dating back 110 million years at the upper levels and going back millions more buried deep. Robert Gehrke, The Salt Lake Tribune, 18 Apr. 2021

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

15 Jun 2021

Cite this Entry

“Geology.” Dictionary, Merriam-Webster, Accessed 18 Jun. 2021.

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More Definitions for geology



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

More from Merriam-Webster on geology

Nglish: Translation of geology for Spanish Speakers


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