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.

a board or tablet on a wall of a building listing the room and floor numbers of the occupants.

a book of directions.

Computers .

a list of files contained in external storage.

a description of characteristics of a particular file, as the layout of fields within each record.

the Directory, French History . the body of five directors forming the executive power of France from 1795 to 1799.

serving to direct; directing; directive.

noun

agenda , almanac , atlas , blue book , book , catalogue , charts , gazeteer , hit list * , index , laundry list * , lineup , list , little black book , record , register , roster , scorecard , short list , social register , syllabus , white pages * , who’s who , yellow pages * , guide , ordo , telephone book , yellow pages