non-event
Word family (noun) event non-event eventuality uneventfulness (adjective) eventful ≠ uneventful eventual (adverb) eventfully ≠ uneventfully eventually
From Longman Dictionary of Contemporary Englishnon-eventˌnon-eˈvent noun [countable usually singular] DISAPPOINTEDan event that is disappointing because it is much less interesting, exciting, or important than you expected In the end, the match turned out to be a non-event.Examples from the Corpusnon-event• Carver's testimony turned out to be a non-event.