multiplicative identity


: an identity element (such as 1 in the group of rational numbers without 0) that in a given mathematical system leaves unchanged any element by which it is multiplied

Word History

First Known Use

1958, in the meaning defined above

Time Traveler
The first known use of multiplicative identity was in 1958

Dictionary Entries Near multiplicative identity

Cite this Entry

“Multiplicative identity.” Dictionary, Merriam-Webster, Accessed 9 Dec. 2023.

Kids Definition

multiplicative identity

: an element of a set that when multiplied by any other element of the set leaves the element unchanged
the number 1 is a multiplicative identity in the set of real numbers

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