The definition of environment is the surroundings or conditions in which a person, animal, or plant lives or operates. And another definition is a natural world, as a whole or in a particular geographical area, especially as affected by human activity.
All the physical surroundings on Earth is called the environment. The environment includes living and non living things in it. We can also define it as the surroundings or conditions in which a person, animal, or plant lives or operates.