Webster’s Dictionary defines Neurodiversity as
1. individual differences in brain functioning regarded as normal variations within the human population;
2. the concept that differences in brain functioning within the human population are normal and that brain functioning that is not neurotypical should not be stigmatized;
3. the inclusion in a group, organization, etc. of people with different types of brain functioning.
If you are interested in reading more about Neurodiversity, please see this article published by Understood as a jumping off point.