delusional /dɪˈluːʒənəl/adjective 2noun 1forms 3 adjective2 •Suffering from delusions; having false or faulty beliefs.You're delusional if you think that plan will work. •Being, in the form of, or relating to, a delusion. noun1 •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 formsdelusionals · more delusional · most delusional