/ Dictionary / Index C Cassius Longinus: Meaning and Definition of Find definitions for: Cas'sius Lon•gi'nus Pronunciation: (lon-jī'nus), [key] died 42 b.c., Roman general: leader of the conspiracy against Julius Caesar. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Cassius cassock Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language