3 [countable]the natural features of a place, for example its weather, the type of land it has, and the type of plants that grow in it [↪ habitat]:
a forest environment
a very adaptable creature that will eat different foods in different environments
WORD FOCUS: environment WORD FOCUS: environment good for the environment:environmentally friendly, eco-friendly, sustainable, recyclable, biodegradable, renewable, organic people who want to protect the environment:greens, eco-warriors things that cause harm to the environment:pollution, greenhouse gases, global warming, acid rain, deforestationenvironment ➔ozone layer, fossil fuel, CFC
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.