Source : Webster's Revised Unabridged Dictionary (1913)

Directory \Di*rect"o*ry\, n.; pl. {Directories}.
   1. A collection or body of directions, rules, or ordinances;
      esp., a book of directions for the conduct of worship; as,
      the Directory used by the nonconformists instead of the
      Prayer Book.

   2. A book containing the names and residences of the
      inhabitants of any place, or of classes of them; an
      address book; as, a business directory.