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

geologist

jē-ˈä-lə-jist 

noun

Examples of geology in a Sentence

learning about the geology of Hawaii

Recent Examples on the Web

Yet if apocalypticism is phrased in the rhetoric of visionary metaphor and symbol, then the current climate crisis is rendered in the language of arid climatology and geology, a distinction which makes a huge difference. —Ed Simon september 24, Literary Hub, 24 Sep. 2025

Organisms profoundly affect the planet’s geology, as well as the atmosphere’s composition. —Chris Impey, The Conversation, 23 Sep. 2025

Started in 2012, the project was slowed by the difficult geology of the Apennine range, including the discovery of natural asbestos. —Dave Smith, Fortune, 19 Sep. 2025

Although the North Aegean’s dynamic environment and geology creates less-than-ideal preservation conditions, the team still discovered evidence of numerous stone tools from multiple Paleolithic periods. —Andrew Paul, Popular Science, 18 Sep. 2025

Word History

Etymology

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

First Known Use

1735, in the meaning defined at sense 1a

Rhymes for geology

• anthology
• apology
• astrology
• biology
• christology
• chronology
• conchology
• cosmology
• cryptology
• cytology
• doxology
• ecology

Kids 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

ˌjē-ə-ˈläj-ik

adjective

or geological

-i-kəl

geologically

-i-k(ə-)lē

adverb

geologist

jē-ˈäl-ə-jəst 

noun