ecology

noun

ecol·​o·​gy i-ˈkä-lə-jē 

e-

plural ecologies

1

: a branch of science concerned with the interrelationship of organisms and their environments

2

: the totality or pattern of relations between organisms and their environment

3

: human ecology

4

: environment, climate

the moral ecology

also : an often delicate or intricate system or complex

the ecology of language

ecologist

i-ˈkä-lə-jist 

e-

noun

Examples of ecology in a Sentence

Recent Examples on the Web

There will be an overview of efforts to expand native pollinator habitat in Solana Beach and a presentation by fire-ecology expert Greg Ruben, owner of California’s Own Native Landscape Design. —Ut Community Press, San Diego Union-Tribune, 14 Apr. 2026

Several local organizations and businesses will be open along the route, offering live music, poetry, food pop-ups and family-friendly activities about climate change and ecology. —Jaclyn Cosgrove, Los Angeles Times, 9 Apr. 2026

Besides their important role in ecosystems, dung beetles are an excellent model group for ecological research because their biology and ecology are relatively well understood, Holzmann said. —Doyle Rice, USA Today, 5 Apr. 2026

Jacob Barney, a Virginia Tech ecology professor, says English ivy should not be planted in home gardens. —Peg Aloi, The Spruce, 5 Apr. 2026

Word History

Etymology

German Ökologie, from öko- eco- + -logie -logy

First Known Use

1875, in the meaning defined at sense 1

Phrases Containing ecology

• deep ecology
• human ecology

Rhymes for ecology

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

Kids Definition

ecology

noun

ecol·​o·​gy i-ˈkäl-ə-jē 

e-

1

: a branch of science concerned with the relationships between living things and their environment

2

: the pattern of relationships between a group of living things and their environment

ecological

ˌē-kə-ˈläj-i-kəl  ˌek-ə- 

adjective

also ecologic

-ˈläj-ik 

ecologically

-ˈläj-i-k(ə-)lē 

adverb

Medical Definition

ecology

noun

ecol·​o·​gy -jē 

plural ecologies

1

: a branch of science concerned with the interrelationship of organisms and their environments

2

: the totality or pattern of relations between organisms and their environment

3

: human ecology

ecological

ˌē-kə-ˈläj-i-kəl  ˌek-ə- 

adjective

also ecologic

-ik 

ecologically

-i-k(ə-)lē 

adverb