/ Dictionary / Index D decurion: Meaning and Definition of Find definitions for: de•cu•ri•on Pronunciation: (di-kyoor'ē-un), [key] — n. Rom. Hist. the head of a decury. a member of the senate of an ancient Roman colony or municipality. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. decuple decurrent Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language