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English definition of “megalomania”

megalomania

noun [U] uk   /ˌmeɡ.əl.əˈmeɪ.ni.ə/ us  
an unnaturally strong wish for power and control, or the belief that you are very much more important and powerful than you really areMental and psychiatric disorders
megalomaniac
noun [C] uk   /-æk/ us  
megalomaniac
adjective [before noun] uk   (also megalomaniacal) us  
(Definition of megalomania from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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