/ Dictionary / Index D Del Rio: Meaning and Definition of Find definitions for: Del Ri•o Pronunciation: (del rē'ō), [key] a city in S Texas, on the Rio Grande. 30,034. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Delray Beach Delsarte Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language