Definition of folder

In Distributed File System (DFS), an object in a namespace that virtualizes multiple shared folders (referred to as folder targets), or in the case of folders without targets, adds hierarchy to the namespace.

A feature that allows users to group tiles and Live Tiles on the Start Screen and keep apps better organized.

An area on a disk for storing- files- in. Folders can also contain other folders, which in turn can contain more folders, and so on almost to infinity.