evential UK /ɪˈvɛn.(t)ʃ.əl/US /ɪˈvɛn.ʃəl/ adjective1 •Pertaining to or composed of events.Moreover, the three orders of duration—evential, conjunctural, and structural—are regarded as commensurable in the terms of the same scale. — 1974 formsmore evential · most evential