ecology

noun

ecol·​o·​gy i-ˈkä-lə-jē How to pronounce ecology (audio)
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
4
: environment, climate
the moral ecology
also : an often delicate or intricate system or complex
the ecology of language
ecologist noun

Examples of ecology in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The essays discuss his relationships with the Ottoman Empire, Colombia, and Rome, and consider his legacy in the context of Indigenous and settler histories, slavery, science, ecology, and religion. Sebastian Smee, New Yorker, 4 May 2026 Beyond bear sightings, the Hillmans offer insight into Tlingit culture, local ecology, and traditional knowledge. Debbie Olsen, Travel + Leisure, 2 May 2026 Not unlike crime scenes, forensic ecology is turning out to provide a window into what’s ailing the turtles. Jenny Staletovich, Miami Herald, 2 May 2026 The 37-year-old artist has gained international attention for her darkly humorous videos and installations that explore Indigenous identity and cosmologies, ecology, futurism, and the line between history and myth. Harrison Jacobs, ARTnews.com, 29 Apr. 2026 See All Example Sentences for ecology

Word History

Etymology

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

First Known Use

1875, in the meaning defined at sense 1

Time Traveler
The first known use of ecology was in 1875

Cite this Entry

“Ecology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ecology. Accessed 9 May. 2026.

Kids Definition

ecology

noun
ecol·​o·​gy i-ˈkäl-ə-jē How to pronounce ecology (audio)
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 adjective
also ecologic
ecologically adverb

Medical Definition

ecology

noun
ecol·​o·​gy -jē How to pronounce ecology (audio)
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
ecological adjective
also ecologic
ecologically adverb

More from Merriam-Webster on ecology

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster