rigor mortis rigoristic • rigorous · · · Info · Definitions · Characters · · rigor mortis · · Text Common · · Latin · · Scripts 12 · · Length 4 · · Syllables Definitions · · · (noun) temporary stiffness of joints and muscular rigidity occurring after death. Synonyms: rigor mortis. · · Noun Definition 1 (noun) muscular stiffening that begins 2 to 4 hours after death and lasts for about 4 days. Synonyms: rigor mortis. · · Noun Definition 2 Characters · · space U+0020 g latin small letter g U+0067 i latin small letter i U+0069 m latin small letter m U+006D o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074