delusional

comparative more delusional · superlative most delusional

1. Suffering from delusions; having false or faulty beliefs.

   You're delusional if you think that plan will work.

   1 more example

   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 […]

   2009, Robert M. Cossel, Master of the Strings, page 57

   Synonyms: deluded

2. Being, in the form of, or relating to, a delusion.

   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), […]

   2009, David M. Semple, Roger Smyth, Oxford Handbook of Psychiatry, page 87

   1 more example

   The latest act in the Madness of King Donald drama playing globally on every channel underlined the increasingly delusional world the anti-hero inhabits, his fantasies fed and indulged by a cast of sycophants, lackeys and straight grifters, all in it for what they can get.

   2026 January 24, Michael Pascoe, “America’s mighty economic power has feet of clay”, in Michael West Media

plural delusionals

1. A person suffering from a delusion.

   But of course, that excludes the narcissistic delusionals, the deliberate frauds, and the pathological cases of multiple personality. They are all out there in New Age Land, and it's a jungle!

   2005, Laura Knight-Jadczyk, The High Strangeness of Dimensions, Densities, and the Process of Alien Abduction