/ Dictionary / Index D Dulles International Airport: Meaning and Definition of Find definitions for: Dul'les Interna'tional Air'port Pronunciation: [key] airport in N Virginia, just west of Washington, D.C., used mainly for international flights. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Dulles dullish 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