- directory - an alphabetical list of names and addresses
--1 is a kind of reference book, reference, reference work, book of facts
--1 has particulars:phonebook, phone book, telephone book, telephone directory; blue book - directory - (computer science) a listing of the files stored in memory (usually on a hard disk)
--2 is a kind of list, listing
--2 has particulars: subdirectory - directory - (computer science) a listing of the files stored in memory (usually on a hard disk)