/ Dictionary / Index Q Quad Cities: Meaning and Definition of Find definitions for: Quad' Cit'ies Pronunciation: [key] the cities of Davenport and Bettendorf, Iowa, together with Rock Island and Moline, Illinois. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. quad quad left Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language