In Microsoft Windows NT, an NTFS file system object (such as a directory) that can contain other objects (such as files). Objects created in a container inherit the access control list (ACL) of the container itself. In other words, a child object obtains its permissions from its parent object by inheritance.
For example, if a directory on an NTFS volume has read permission assigned to the Everyone group, any new file that you create or save in the directory will inherit the same permission. Using containers therefore simplifies the assignment of permissions to objects in the file system.