geology

1 of 2

noun (1)

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

geologist

2 of 2

noun (2)

ge·​ol·​o·​gist jēˈäləjə̇st 

plural -s

: a specialist in geology

Examples of geology in a Sentence

Noun (1)

learning about the geology of Hawaii

Recent Examples on the Web

Noun

New mineral supply also involves considerations beyond geology. — Matthew Kayser, USA Today, 21 Aug. 2026

The local geology explains how this gas is produced and transported. — Aman Tripathi, Interesting Engineering, 20 Aug. 2026

Conversations jumped from eclipses to wildlife, travel, geology and perhaps, inevitably for a ship full of skywatchers, clouds. — Daisy Dobrijevic, Space.com, 19 Aug. 2026

Students acquire a strong foundation in geology, biology, chemistry and astronomy. — Sacbee.com, 19 Aug. 2026

Word History

Etymology

Noun (1)

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

Noun (2)

geology + -ist

First Known Use

Noun (1)

1735, in the meaning defined at sense 1a

Rhymes for geology

• ology
• aetiology
• anthropology
• archaeology
• archeology
• audiology
• cardiology
• climatology
• cohomology
• cosmetology
• criminology
• demonology

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