Definition of megalomania noun from the Oxford Advanced Learner's Dictionary

     

    megalomania

     noun
    noun
    BrE BrE//ˌmeɡələˈmeɪniə//
     
    ; NAmE NAmE//ˌmeɡələˈmeɪniə//
     
    [uncountable] Mental and emotional problems
     
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  1. 1(specialist) a mental illness or condition in which somebody has an exaggerated belief in their own importance or power See related entries: Mental and emotional problems
  2. 2a strong feeling that you want to have more and more power
See the Oxford Advanced American Dictionary entry: megalomania