/ Dictionary / Index S SDS: Meaning and Definition of Find definitions for: SDS Pronunciation: [key] Students for a Democratic Society: a radical political organization, esp. of college students, active in the U.S. in the 1960s. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sds (Thesaurus) SDR SE 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