/ Dictionary / Index D decemvir: Meaning and Definition of Find definitions for: de•cem•vir Pronunciation: (di-sem'vur), [key] — pl. -virs, -vi•ri a member of a permanent board or a special commission of ten members in ancient Rome, esp. the commission that drew up Rome's first code of law. a member of any council or ruling body of ten. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Decembrist decemvirate Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language