Meaning of “megalomania” in the English Dictionary

"megalomania" in British English

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megalomanianoun [ U ]

uk /ˌmeɡ.əl.əˈmeɪ.ni.ə/ us /ˌmeɡ.əl.əˈmeɪ.ni.ə/

an unnaturally strong wish for power and control, or the belief that you are very much more important and powerful than you really are

megalomaniac
noun [ C ] uk /ˌmeɡ.əl.əˈmeɪ.ni.æk/ us /ˌmeɡ.əl.əˈmeɪ.ni.æk/
megalomaniac
adjective [ before noun ] uk /ˌmeɡ.əl.əˈmeɪ.ni.æk/ us /ˌmeɡ.əl.əˈmeɪ.ni.æk/ also megalomaniacal,

(Definition of “megalomania” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"megalomania" in American English

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megalomanianoun [ U ]

us /ˌmeɡ·ə·ləˈmeɪ·ni·ə/

the belief that you are much more important and powerful than you really are

(Definition of “megalomania” from the Cambridge Academic Content Dictionary © Cambridge University Press)