<p><strong>Noun</strong></p><ul><li>a book containing an alphabetical index of the names and addresses of persons in a city, district, organization, etc., or of a particular category of people.</li><li>a board or tablet on a wall of a building listing the room and floor numbers of the occupants.</li><li>a book of directions.</li><li>Computers. Also called folder. an organizing unit in a computer's file system for storing and locating files. In a hierarchical file system, directories can contain child directories (subdirectories) as well as files.</li><li>a description of characteristics of a particular file, as the layout of fields within each record.</li><li>the Directory, French History. the body of five directors forming the executive power of France from 1795 to 1799.</li></ul><p><strong>Adjective</strong></p><ul><li>serving to direct; directing; directive.</li></ul>