delusion

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delusion /dɪˈluːʒən/ noun
plural delusions
delusion
/dɪˈluːʒən/
noun
plural delusions
Learner's definition of DELUSION
[count]
: a belief that is not true : a false idea
: a false idea or belief that is caused by mental illness
◊ If you have delusions of grandeur, you believe that you are much more important than you really are.

— delusional

/dɪˈluːʒənl̟/ adjective [more delusional; most delusional]
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