experiential UK /ɛkˌspɪəɹiˈɛnʃəl/US /ɪkˌspɪɹiˈɛnʃəl/ adjective1 •Of, related to, encountered in, or derived from experience.Atheists argue that there is no experiential confirmation for the existence of a god.Each color has a unique experiential quality. formsmore experiential · most experiential