The definition of the word "environment" is the total of all surrounding objects, influences or circumstances. In an ecological sense, it refers to the water, air, minerals and organisms of a particular area. It can also refer to the cultural or social influences that shape a person's life.
The word "environment" is a noun. An example of how it can be used in a sentence is as follows: "The coal factory polluted the surrounding environment so badly that the river could no longer be used for fishing." Another example is, "The child's home environment was a safe and loving one."