Meaning & use
delusion
A false belief held firmly despite clear evidence that it is not true.
See it in a sentence
His delusion that he could win the lottery led him to overspend recklessly.
The patient's delusions about being followed worried his family greatly.
A note on using this word
In psychology it refers to a fixed false belief resistant to reasoning, distinct from an ordinary mistaken idea.
Words with a similar meaning
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