Definition of factorial
: of, relating to, or being a factor or a factorial
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Origin and Etymology of factorial
Definition of factorial
1
: the product of all the positive integers from 1 to n
—symbol n!
2
: the quantity 0! arbitrarily defined as equal to 1
Origin and Etymology of factorial
borrowed from French factorielle, noun derivative from feminine of factoriel 1factorial
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First Known Use: 1869
in the meaning defined at sense 1
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