Definition of identity element
: an element (such as 0 in the set of all integers under addition or 1 in the set of positive integers under multiplication) that leaves any element of the set to which it belongs unchanged when combined with it by a specified operation
First Known Use of identity element
Learn More about identity element
Britannica.com: Encyclopedia article about identity element
Seen and Heard
What made you want to look up identity element? Please tell us where you read or heard it (including the quote, if possible).