/ Dictionary / Index S sestertius: Meaning and Definition of Find definitions for: ses•ter•tius Pronunciation: (se-stûr'shus, -shē-us), [key] — pl. -ti•i sesterce. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sestertium sestet 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