Definition of factorial
: of, relating to, or being a factor or a factorial
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1837
First Known Use of factorial
1837
2
factorial
noun
fac·to·ri·al
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
1869
First Known Use of factorial
1869
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