/ Dictionary / Index E EMS: Meaning and Definition of Find definitions for: EMS Pronunciation: [key] emergency medical service. European Monetary System. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ems (Thesaurus) em quad EMT Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language