Looking for the meaning or definition of the word factorial? Here's what it means.
Noun
(mathematics) The result of multiplying a given number of consecutive integers from 1 to the given number. In equations, it is symbolized by an exclamation mark (!). For example, 5! = 1 × 2 × 3 × 4 × 5 = 120.
Adjective
(mathematics) Of or pertaining to a factor or factorial.