A list of names, addresses etc, of specific classes of people or organizations, often in alphabetical order or in some classification.

Containing directions; instructing; directorial.

plural of directory

Of or pertaining to a director / Of or pertaining to administration or to a directorate

In terms of film direction.

(Britain) Of a telephone number, not in the directory; unlisted.

A listing of telephone subscribers in a specific geographical area, together with their telephone numbers and, sometimes, a street address.

plural of directory service

(computing) The software system that stores, organizes and provides access to information in a map between names and values.

Alternative spelling of nondirectory