/ Dictionary / Index S S. Doc.: Meaning and Definition of Find definitions for: S. Doc. Pronunciation: [key] Senate document. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. SDI SDR 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