Added 10 October 2026 missment noun Categories: Obscure Words noun ! Definition from Wiktionary (CC BY-SA). More about missment at Wordnik → Where our words come from → A mistake; an error. Related Words: mistakingmishmissayingmistakemiseditionmisgomissermisprisionmisstepmisspeechmisbeliefmistreading Back to today's word