English · Word Candidate

delusional

/dɪˈluːʒənəl/

Proposed by a contributor, not yet supported by evidence.

Also seen as: delusionals

Sense 1

Meaning · English

Suffering from delusions; having false or faulty beliefs.

Adjective

Examples

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

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Sense 2

Meaning · English

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

Adjective

Examples

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), […]

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Sense 3

Meaning · English

A person suffering from a delusion.

Noun

Examples

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!

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Common questions

What does “delusional” mean?

Suffering from delusions; having false or faulty beliefs.

Is “delusional” formal or informal?

No register label has been reviewed yet — treat it as neutral and check the usage notes above.