/ Dictionary / Index C Commodus: Meaning and Definition of Find definitions for: Com•mo•dus Pronunciation: (kom'u-dus), [key] a.d. 161–192, Roman emperor 180–192; son and successor of Marcus Aurelius. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. commodore common Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language