- of a factor
- Math. of factors or factorials

*factorial*of 5 (5!) is 1 × 2 × 3 × 4 × 5, or 120

- of a factor
- Math. of factors or factorials

Math. the product of a given series of consecutive whole numbers beginning with 1 and ending with the specified number: the *factorial* of 5 (5!) is 1 × 2 × 3 × 4 × 5, or 120

Webster's New World College Dictionary, Fifth Edition Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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"factorial." YourDictionary, n.d. Web. 12 October 2018. <http://www.yourdictionary.com/factorial>.

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factorial. (n.d.). Retrieved October 12th, 2018, from http://www.yourdictionary.com/factorial

noun

The product of all the positive integers from 1 to a given number: * 4 factorial, usually written 4!, is equal to 24 (1 × 2 × 3 × 4 = 24).*

adjective

Of or relating to a factor or factorial.

THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Copyright © 2016, 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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**MLA Style**

"factorial." YourDictionary, n.d. Web. 12 October 2018. <http://www.yourdictionary.com/factorial>.

**APA Style**

factorial. (n.d.). Retrieved October 12th, 2018, from http://www.yourdictionary.com/factorial

Noun

(*plural* factorials)

- (mathematics, combinatorics) 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.

Usage notes

"*n*!" is read as "factorial of *n*" or "*n* factorial."

English Wiktionary. Available under CC-BY-SA license.

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**MLA Style**

"factorial." YourDictionary, n.d. Web. 12 October 2018. <http://www.yourdictionary.com/factorial>.

**APA Style**

factorial. (n.d.). Retrieved October 12th, 2018, from http://www.yourdictionary.com/factorial

Computer Desktop Encyclopedia THIS DEFINITION IS FOR PERSONAL USE ONLY All other reproduction is strictly prohibited without permission from the publisher. © 1981-2017 The Computer Language Company Inc. All rights reserved.

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**MLA Style**

"factorial." YourDictionary, n.d. Web. 12 October 2018. <http://www.yourdictionary.com/factorial>.

**APA Style**

factorial. (n.d.). Retrieved October 12th, 2018, from http://www.yourdictionary.com/factorial