delusion
Delusion (noun) means a firmly held false belief, maintained even against clear evidence. Example: “His delusion that he was being watched grew worse over the years.”
How to use delusion
Learner’s notesIn plain EnglishA false belief someone holds onto tightly, even when the facts say otherwise.
In clinical use, a delusion is a specific symptom of certain mental health conditions, not just any mistaken idea.
Word forms
- Plural
- delusions
Fill the gap
Can you complete this real example?
His _____ that he was being watched grew worse over the years.
Etymology
From Latin delusio, from deludere ("to deceive").