What does "delusional" mean?

A person suffering from a delusion.

What is a synonym for "delusional"?

Common synonyms include: airy, all in the mind, apparent, autistic, blind, chimerical.

Pronounced //dɪˈluːʒənəl//.

//dɪˈluːʒənəl// adj, noun

adj, noun ·Uncommon ·Advanced level

Noun

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!"

Adjective

1
Suffering from delusions; having false or faulty beliefs.
"You're delusional if you think that plan will work."
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), […]"