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

But Seminole’s Special Magistrate Sherry Sutphen chastised Moncrief, a resident of The Springs neighborhood, for likely damaging the river’s ecology behind his home and obstructing its natural flow. — Martin E. Comas, The Orlando Sentinel, 22 Aug. 2026

However, as someone who has been studying Antarctic krill ecology and their role in the Southern Ocean ecosystem for 16 years, what currently concerns me most is how locally concentrated that harvest has become. — Kim S. Bernard, The Conversation, 21 Aug. 2026

Scholars at the intersection of organizational ecology and institutional theory have long observed this dynamic. — Byleonie H. Mattison, Forbes.com, 18 Aug. 2026

In his essay, a Saline resident states that her faith in democracy is being tested, echoing sentiments expressed in communities across the country by people who understand that their ecology and health are at stake as these facilities proliferate. — Rana Mitter, Harpers Magazine, 4 Aug. 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