noun The surroundings of, and influences on, a particular item of interest.
noun The natural world or ecosystem.
noun All the elements that affect a system or its inputs and outputs.
noun A particular political or social setting, arena or condition.
noun The software or hardware existing on any particular computer system.
That program uses the Microsoft Windows environment.
noun The environment of a function at a point during the execution of a program is the set of identifiers in the function's scope and their bindings at that point.
noun The set of variables and their values in a namespace that an operating system associates with a process.