Try Our Apps


Avoid these words. Seriously.


[jee-ol-uh-jee] /dʒiˈɒl ə dʒi/
noun, plural geologies.
the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is undergoing.
the study of this science.
the geologic features and processes occurring in a given region on the earth or on a celestial body:
the geology of Mars; the geology of eastern Kentucky.
Origin of geology
First recorded in 1680-90; geo- + -logy Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for geology
Contemporary Examples
Historical Examples
British Dictionary definitions for geology


the scientific study of the origin, history, structure, and composition of the earth
the geological features of a district or country
Derived Forms
geological (ˌdʒɪəˈlɒdʒɪkəl), geologic, adjective
geologically, adverb
geologist, geologer, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for geology

1735, from Modern Latin geologia "the study of the earth," from geo- "earth" + logia (see -logy). In Medieval Latin, geologia (14c.) meant "study of earthly things," i.e. law, as distinguished from arts and sciences, which concern the works of God. Darwin used geologize as a verb.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
geology in Science
  1. The scientific study of the origin of the Earth along with its rocks, minerals, land forms, and life forms, and of the processes that have affected them over the course of the Earth's history.

  2. The structure of a specific region of the Earth, including its rocks, soils, mountains, fossils, and other features.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
geology in Culture

geology definition

The science devoted to the study of the Earth, particularly the solid Earth and the rocks that compose it.

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source

Word of the Day

Nearby words for geology

Difficulty index for geology

Most English speakers likely know this word

Word Value for geology

Scrabble Words With Friends