/ Dictionary / Index D Distinguished Service Medal: Meaning and Definition of Find definitions for: Distin'guished Serv'ice Med"al Pronunciation: [key] a decoration awarded for exceptionally meritorious performance of a duty of great responsibility. a decoration awarded for distinguished conduct in war. Abbr.: D.S.M. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Distinguished Service Cross Distinguished Service Order Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language