delusional

About 0.75 uses per million words.

Meaning

1. adjective Suffering from delusions; having false or faulty beliefs.

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

2. adjective Being, in the form of, or relating to, a delusion.
3. noun A person suffering from a delusion.

Similar words

neurotic psychoneurotic illusive illusory misleading whimsical amazing erratic inconsistent imaginary

Often followed by

disorder system thinking ideas beliefs and belief disorders insanity

Word family

delusion delusionary delusions