English dictionary, thesaurus, translations & etymology
FreeDict.com
adjective Uncommon

delusional

dih-LOO-zhuh-nuhl
Quiz me More like this

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
Vocabulary Flow
Build your vocabulary from words like delusional.
Vocabulary Flow serves the next word, and the next — meaning, pronunciation and an example each time. Practice at your level, or learn English in your own language.
Start vocabulary practice

Word forms

Plural
delusionals
Comparative
more delusional
Superlative
most delusional
Test yourself on “delusional” A quick quiz — meaning, synonyms & usage →

Fill the gap

Can you complete this real example?

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

Etymology

Formed from delusion and -al.

Related words

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.

People also searched