/ Dictionary / Index D D.M.S.: Meaning and Definition of Find definitions for: D.M.S. Pronunciation: [key] Director of Medical Services. Doctor of Medical Science. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dms (Thesaurus) DMN DMSO Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language