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1

factorial

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adjective fac·to·ri·al \fak-ˈtȯr-ē-əl\

Definition of factorial

  1. :  of, relating to, or being a factor or a factorial



1837

First Known Use of factorial

1837


2

factorial

noun fac·to·ri·al

Definition of factorial

  1. 1 :  the product of all the positive integers from 1 to n —symbol n!

  2. 2 :  the quantity 0! arbitrarily defined as equal to 1



1869

First Known Use of factorial

1869


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