English Reference
noun

ecosystem

n.
US /ˈikoʊˌsɪstəm/ UK /ˈiːkəʊsˌɪstəm/ ecosys·tem UK spelling ecosystems

  1. 01 B2 Upper Intermediate Science

    all the living things in an area and the way they affect each other and the environment.

    a biological community of interacting organisms and their physical environment, functioning as a single unit.

    Simple

    Pollution in the river can damage the entire local ecosystem and kill the fish.

    In context

    The introduction of invasive species can disrupt the delicate balance of a forest ecosystem, leading to the decline of native flora and fauna.

    Usage

    Often used with adjectives like 'fragile', 'local', or 'marine'.

  2. 02 C1 Advanced Academic Computing

    a group of businesses or products that work together and depend on each other.

    a complex network or interconnected system of people, organisations, or services that interact like a biological community.

    Simple

    Many people stay with the same phone brand because they like the app ecosystem.

    In context

    The company has built a vast digital ecosystem where its hardware, software, and payment services are seamlessly integrated to retain customers.

    Usage

    Commonly used in business and technology contexts to describe platform interdependency.

Usage ecosystems to function

Without vultures, ecosystems would lose a natural defence against the spread of disease.

BBC News· 12 Aug 2026

In this city, these devices have become a normal part of the transport ecosystem, along with e-bikes.

BBC News· 22 Jul 2026

From eco- + system. Coined by English botanist Arthur Tansley in 1935 in a paper titled The Use and Abuse of Vegetational Concepts in the journal Ecology.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated