/ Dictionary / Index Z Zosimus: Meaning and Definition of Find definitions for: Zo•si•mus Pronunciation: (zō'su-mus), [key] pope 417–418. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Zoser zoster Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language