Top Definition
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?
by bandcampgirl183 September 12, 2005
17 more definitions
Used to describe someone attached to an idea which is either false, or has changed. An alternative to "living in the past."
1. James still thinks we live in a democracy. He's delusional.

2. Paul listens to the Bee Gees and drives a Trans Am. He's delusional on the 70s, man.
by Col. Dr. April 24, 2006
1. the state of having a false opinion or belief

2. H/Hr shippers
Idiot: Harry and Hermione are like sooooo meant to be together...

Me: You're incredibly delusional... If you could read you would realise Ron and Hermione have amazing amounts of sexual tension...
by msweasley June 05, 2007
An insult/label often flung at those who have beliefs that are not commonly accepted.
Person 1: I believe aliens are visiting Earth.

Person 2: OMG UR DELUSIONAL

Person 1: No I am not, I've thought about the issue thoroughly

Person 2: DELUSIONAL DELUSIONAL DELUSIONAL IM GONNA HAV U LOKD UP
by Shadow Creator March 21, 2008
adj.
1. Someone who believes only their way, and everyone else is wrong.

2. Someone who is obsessed or stuck on one false belief and ignorantly denies logic and reasoning.

3. A derogatory term that Atheists use to describe Christians and other religious people.

4. paranoid
The Preacher shunned the homosexual because he was delusional.
by J.Wil888 February 03, 2009
When someone believes something to be the exact opposite of what it actually is. Such as when someone believes that someone whom they stalk and harass both in person and in cyberspace, thinks only about him/her and misses him/her and loves and longs to be with him/her when in actuality they don't think anything other than you are a pathetic creep/jerk with no life who obviously has a lot to learn in the way of making and maintaining healthy relationships. These are often the same conceited creeps who make futile attempts to make the object of their obsession jealous because they are too ignorant to realize that people are not all like them and that people who are secure with themselves do not get jealous and see their actions as really really lame and pathetic.
ALL those men from El Minya are DELUSIONAL especially HeisamledbA, KalaM, RemA and the list goes on.
by Goddess12* December 17, 2013
1. The state of having a false opinion or belief.

2. Used to describe someone attached, possibly obbsessed, with an idea which is either false, or has changed. Synonymous to "living in the past."
Shannon really thinks she could get him back even though its clear there is no way of that EVER happening?!... She's delusional.
by MeowMeoow October 08, 2010

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