/ Dictionary / Index M Marcellus: Meaning and Definition of Find definitions for: Mar•cel•lus Pronunciation: (mär-sel'us), [key] 268?–208 b.c.,Roman general and consul. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Marcello Marcellus I Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language