/ Dictionary / Index D DST: Meaning and Definition of Find definitions for: DST Pronunciation: [key] daylight-saving time. D.S.T. Pronunciation: [key] daylight-saving time. Doctor of Sacred Theology. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. D.S.S. D. Surg. Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language