casus belli casula • caswellite · · · Info · Definitions · Characters · · casus belli · · Text Common · · Latin · · Scripts 11 · · Length 4 · · Syllables Definitions · · · (noun) an event used to justify starting a war. Synonyms: casus belli. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C s latin small letter s U+0073 u latin small letter u U+0075