Home › Words › D › delusionismdelusionismdelusionism · noun — belief in something false; the state of being delusional.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom delusion + -ism.nounBelief in something false; the state of being delusional.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.delusionistic 89% match — Relating to delusion or delusionism; believing something that is false. vs delusionism →delusionist 84% match — A delusional person; one who believes something that is false. vs delusionism →delusionality 79% match — The quality or state of being delusional. vs delusionism →deludedness 78% match — The state of being deluded. vs delusionism →delusionary 76% match — Delusional. vs delusionism →delusion 74% match — An adamant belief in a falsehood despite incontestable evidence. vs delusionism →delusional 73% match — Suffering from delusions; having false or faulty beliefs. vs delusionism →delusiveness 72% match — The state or quality of being delusive. vs delusionism →