Jacobin jacobin • Jacobinia · · · Info · Definitions · Characters · · Jacobin · · Text Latin · · Script 7 · · Length 3 · · Syllables Definitions · · · (noun) a member of the radical movement that instituted the Reign of Terror during the French Revolution. · · Noun Definition 1 Characters · · J latin capital letter j U+004A a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F