A directory is defined as a book or a program that contains data and other information.(noun)
An example of a directory is a telephone book.
The definition of directory is having the purpose of guiding.(adjective)
An example of directory used as an adjective is a directory tool, such as a campus map.
See directory in Webster's New World College Dictionary
Origin: LL directorius
noun pl. directories
Origin: ML directorium < LL directorius
See directory in American Heritage Dictionary 4
noun pl. di·rec·to·ries
Learn more about directory