delusion Definition

a belief or impression that is not in line with reality, typically one that is maintained despite being contradicted by what is generally accepted as evidence or rational argument.

Using delusion: Examples

Take a moment to familiarize yourself with how "delusion" can be used in various situations through the following examples!

  • Example

    He was under the delusion that he could fly.

  • Example

    Her delusion about her husband's fidelity was shattered when she found out about his affair.

  • Example

    The cult leader's delusions led to tragic consequences for his followers.

  • Example

    The patient's delusions were a symptom of his mental illness.

delusion Synonyms and Antonyms

Synonyms for delusion

Antonyms for delusion

Phrases with delusion

  • a false belief in one's own superiority, greatness, or power


    His grandiose delusions led him to believe he was a god.

  • a false belief that one is being mistreated, harassed, or conspired against by others


    Her persecutory delusions made her believe that everyone was out to get her.

  • a false belief that events, objects, or other people have a particular and unusual significance specifically for oneself


    His delusion of reference made him believe that the TV was sending him secret messages.

Origins of delusion

from Latin 'deludere', meaning 'to deceive'


Summary: delusion in Brief

A 'delusion' [dɪˈluːʒən] is a belief or impression that is not in line with reality, often maintained despite evidence to the contrary. It can manifest in various forms, such as grandiose delusions, where one believes in their own superiority, or persecutory delusions, where one feels mistreated by others. 'Delusion' is often associated with mental illness.

How do native speakers use this expression?