As a Noun: 1. Everything which affects a person in their daily life, for example the place where they live, the people around them, and the things that they experience. English = environment. 2. The natural world of land, sea, air, plants, and animals that exists outside of towns and cities. English = environment. 3. As a Verb or Adjective: 1. To be concerned with or to relate to either the surroundings in which a person or animal lives, or the natural world as a whole. English = environmental.