Oxford Dictionary English inauthentic adjectiveadjective BrE BrE//ˌɪnɔːˈθentɪk// ; NAmE NAmE//ˌɪnɔːˈθentɪk// Add to my wordlistjump to other resultsnot genuine; that you cannot believe or rely on opposite authenticSee inauthentic in the Oxford Advanced American DictionaryCheck pronunciation: inauthentic oxfordlearnersdictionaries.com