/ Dictionary / Index D Dulles: Meaning and Definition of Find definitions for: Dul•les Pronunciation: (dul'us), [key] 1888–1959, U.S. statesman: secretary of state 1953–59. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dulles (Thesaurus) dullard Dulles International Airport Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language