/ Dictionary / Index S SED: Meaning and Definition of Find definitions for: SED Pronunciation: [key] shipper's export declaration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. secy Sedalia 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