/ Dictionary / Index S SMS: Meaning and Definition of Find definitions for: SMS Pronunciation: [key] Synchronous Meteorological Satellite. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sms (Thesaurus) Smriti SMSA Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language