/ Dictionary / Index D Deep South: Meaning and Definition of Find definitions for: Deep' South' Pronunciation: [key] the southeastern part of the U.S., including esp. South Carolina, Georgia, Alabama, Mississippi, and Louisiana. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. deep six deep space Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language