Learner's definition of ENVIRONMENT
1 : the conditions that surround someone or something: the conditions and influences that affect the growth, health, progress, etc., of someone or something
He grew up in a loving environment.
an informal office environment
We're trying to create a better business/learning environment.
These animals were raised in a controlled environment.
Many plants are unable to survive in such a harsh/hostile environment.
2 the environment : the natural world