Top Definition
1. To not see something that is actually there.

2. The mirror or polar opposite to a hallucination. Although quite similar.

3. To be so abstinent from all substances that you actually start to hallucinate.
Kim: You weren't in class the other day, where were you?

Dylan: Excuse me? I was sitting next to you the entire time, You even forced me to borrow your pencil like you always do. You really need to stop dehallucinating
by Icantcomeupwithagoodname February 28, 2013

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