Well, here’s a definition that comprises several groups of people. Aryan –noun 1. Ethnology. a member or descendant of the prehistoric people who spoke Indo-European. 2. (in Nazi doctrine) a non-Jewish Caucasian, esp. of Nordic stock. 3. (formerly) Indo-European. 4. (formerly) Indo-Iranian. –adjective 5. of or pertaining to an Aryan or the Aryans. 6. (formerly) Indo-European. 7. (formerly) Indo-Iranian.