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Dictionary definition for: Delusion
1. (n) (psychology) an erroneous belief that is held in the face of evidence to the contrary
2. (n) a mistaken or unfounded opinion or idea; "he has delusions of competence" "his dreams of vast wealth are a hallucination"
3. (n) the act of deluding; deception by creating illusory ideas
WordNet 2.1 Copyright Princeton University. All rights reserved.