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adjective Uncommon

delusional

dih-LOO-zhuh-nuhl

Delusional (adjective) means believing things that are clearly untrue, or relating to such false beliefs. Example: “He's delusional if he thinks the team will win the title this year.”

adjective
1
Believing things that are clearly untrue, or relating to such false beliefs.
"He's delusional if he thinks the team will win the title this year."
"Her delusional thinking worried her family."

How to use delusional

Learner’s notes

In plain EnglishOut of touch with reality — holding beliefs that just aren't true.

When to use it

Often used casually and hyperbolically in everyday speech ("you're delusional") without any clinical meaning intended.

Common pairings
completely delusional delusional thinking

Word forms

more delusional comparative, delusionals plural, most delusional superlative

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He's _____ if he thinks the team will win the title this year.

Etymology

From delusion + -al.

Rhymes for delusional

See all rhymes for delusional →

Frequently asked questions

What does “delusional” mean?

The word “delusional” means believing things that are clearly untrue, or relating to such false beliefs. In plain terms, out of touch with reality — holding beliefs that just aren't true.

How do you pronounce “delusional”?

“Delusional” is pronounced dih-LOO-zhuh-nuhl (/dɪˈluːʒənəl/ in IPA).

How do you use “delusional” in a sentence?

Here is “delusional” used in a sentence: “He's delusional if he thinks the team will win the title this year.”

What part of speech is “delusional”?

“Delusional” is an adjective.

Is “delusional” a common word?

“Delusional” is an uncommon word in modern English.

Definitions: FreeDict original editorial · etymology from Wiktionary