Definitions
1.nounA list of names, addresses etc, of specific classes of people or organizations, often in alphabetical order or in some classification.
2.nounA structured listing of the names and characteristics of the files on a storage device.
3.nounA virtual container in a computer's file system, in which files and other directories may be stored. The files and subdirectories in a directory are usually related.
4.adjectiveContaining directions; instructing; directorial.