Pronunciation (UK) IPA (key): /ˈiːkəʊˌsɪstəm/ (US) IPA (key): /ˈikoʊˌsɪstəm/ Audio (US)(file) Hyphenation: eco‧sys‧tem Noun Singular ecosystem Plural ecosystems (countable) An ecosystem is a large community of living organisms in a particular area. Related words ecology systemWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads