Believing something to be true that is clearly not. Someone who is not thinking clearly. Used to describe someone attached to an idea which is obviously false.
Jon believes he is always right. He's delusional.
When someone clings to the opinions in their head despite the facts. Often times these people do not want to measure the accuracy of their opinions and believe their situation is overly unique.
Tom is delusional, he thinks he is the best parent in the world but his kid is 4 years old and cant spell his own name.
from the latin delusio, the act of being delusional, as coined by a MSFT technologist
That person is delusionable
So far removed from reality that one fails to think and live in the real world.
You guys are delusional.
Someone who is not thinking clearly, or thinks something will happen that, in all likelyhood, will not.
guy1: So I'm thinking of asking Leah out. I think she might say yes.
guy2: Ummm, are you delusional or something?
An individual who is given evidence or proof of an event or some doing. And still refusing to believe.
Gary is Delusional. He thinks what he thinks is right, yet he still lies, steals and cheats.
Delusional + Reality = Delusionality
When someone goes as far as confusing their own personal delusions with reality.
plural form: Delusionalities
When she told me that she swore she seen a glowing-pink horse with giant wings flying around town, I knew she was a victim of her own delusionality.