/ Dictionary / Index S Smithson: Meaning and Definition of Find definitions for: Smith•son Pronunciation: (smith'sun), [key] 1765–1829, English chemist and mineralogist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Smithfield ham Smithsonian Institution 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