delusion
/dɪˈl(j)uːzjən/ · de.lu.sion
noun
- A false belief that is resistant to confrontation with actual facts. Her delusion that she was a famous actress led her to spend all her savings on a lavish lifestyle.
- The state of being deluded or misled, or process of deluding somebody. The politician's delusion of grandeur led him to make promises he couldn't keep.
- That which is falsely or delusively believed or propagated; false belief; error in belief. The company's delusion about the market led to a catastrophic financial collapse.
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Did you know? The term 'delusion' has been used in psychology since the 17th century to describe a persistent false belief that is not based on reality.