delusional

Definition

Suffering from delusions; having false or faulty beliefs.

Etymology

From delusion + -al.

Example Sentences

• "You're delusional if you think that plan will work."
• "Morgan could not remember the last time he had heard his first name used, and he had not even been aware that Captain Jackson knew it. Regardless, he could not reply; he was sure he must be delusional. He had lost too much blood […]"
• "Delusional jealousy […] A delusional belief that one's partner is being unfaithful. This can occur as part of a wider psychotic illness, secondary to organic brain damage (e.g. following the 'punch drunk syndrome' in boxers), […]"