Cassius cassius • cassius clay · · · Info · Definitions · Characters · · Cassius · · Text Latin · · Script 7 · · Length 3 · · Syllables Definitions · · · (noun) prime mover in the conspiracy against Julius Caesar (died in 42 BC). Synonyms: Cassius Longinus, Gaius Cassius Longinus. · · Noun Definition 1 Characters · · C latin capital letter c U+0043 a latin small letter a U+0061 i latin small letter i U+0069 s latin small letter s U+0073 u latin small letter u U+0075