adjective

delusional

dih-LOO-zhuh-nuhl

adjective

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

more delusional comparative, delusionals plural, most delusional superlative

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Can you complete this real example?

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

coronal rational diagonal personal seasonal national optional regional hormonal fictional emotional irrational