Simple Definition of delusion
: a belief that is not true : a false idea
: a false idea or belief that is caused by mental illness
Full Definition of delusion
2 a : something that is falsely or delusively believed or propagated b : a persistent false psychotic belief regarding the self or persons or objects outside the self that is maintained despite indisputable evidence to the contrary; also : the abnormal state marked by such beliefs
delusionalplay \-ˈlüzh-nəl, -ˈlü-zhə-nəl\ adjective
delusionaryplay \-zhə-ˌner-ē\ adjective
Examples of delusion in a sentence
He has delusions about how much money he can make at that job.
He is living under the delusion that he is incapable of making mistakes.
She is under the delusion that we will finish on time.
As the illness progressed, his delusions took over and he had violent outbursts.
Origin and Etymology of delusion
Middle English, from Late Latin delusion-, delusio, from deludere
First Known Use: 15th century
Synonym Discussion of delusion
Rhymes with delusion
affusion, allusion, Carthusian, collusion, conclusion, confusion, contusion, diffusion, effusion, elusion, exclusion, extrusion, illusion, inclusion, infusion, intrusion, Malthusian, obtrusion, occlusion, perfusion, prelusion, profusion, prolusion, protrusion, reclusion, seclusion, transfusion, Venusian
DELUSION Defined for Kids
Definition of delusion for Students
: a false belief that continues in spite of the facts <“You might be laboring under the delusion that the entire … world is impressed with you …” — J. K. Rowling, Goblet of Fire>
Medical Definition of delusion
1a: the act of deluding : the state of being deludedb: an abnormal mental state characterized by the occurrence of psychotic delusions
Learn More about delusion
Thesaurus: All synonyms and antonyms for delusion Medical Dictionary: Definition of delusion Spanish Central: Translation of delusion Nglish: Translation of delusion for Spanish speakers Britannica English: Translation of delusion for Arabic speakers Britannica.com: Encyclopedia article about delusion
Seen and Heard
What made you want to look up delusion? Please tell us where you read or heard it (including the quote, if possible).