delusion
(noun)
noun
1. (psychology) an erroneous belief that is held in the face of evidence to the contrary
Definition categories: state
2. a mistaken or unfounded opinion or idea
- he has delusions of competence
Similar word(s): hallucination
Definition categories: thought, misconception
3. the act of deluding; deception by creating illusory ideas
Similar word(s): illusion
Definition categories: act, deceit, deception, dissembling, dissimulation