[{"Bold_text": "noun", "List Items": ["Mathematics.the product of a given positive integer multiplied by all lesser positive integers: The quantity four factorial (4!) = 4 ? 3 ? 2 ? 1 = 24.:n!,wherenis the given integer."]}, {"Bold_text": "adjective", "List Items": ["Mathematics.of or relating to factors factorials.", "of or relating to a factor a factory."]}]