- A type of delusion in which the afflicted person considers himself or herself possessed of greatness. He/she believes him/herself to be Christ, God, Napoleon, anyone famous, or everyone and everything, including a lawyer, physician, clergyman, merchant, prince, or super athlete in all sports.
- Morbid verbalized overevaluation of oneself or of some aspect of oneself.
[megalo- + G. mania, frenzy]
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Examples: glitazone, GI cocktail, etc.