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See more synonyms for megalomaniac on Thesaurus.com
  1. a person afflicted with megalomania.
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  1. Also meg·a·lo·ma·ni·a·cal [meg-uh-loh-muh-nahy-uh-kuh l] /ˌmɛg ə loʊ məˈnaɪ ə kəl/, meg·a·lo·man·ic [meg-uh-loh-man-ik] /ˌmɛg ə loʊˈmæn ɪk/. of, relating to, or suggesting megalomania or a person who is afflicted with it.
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Origin of megalomaniac

First recorded in 1885–90; megalo- + maniac
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for megalomaniac

Contemporary Examples

Historical Examples

  • That is the point overlooked by the megalomaniac school of Nietzsche and Shaw.

  • But whisky transformed him from a twitching neurotic into a megalomaniac.


    M. Leonora Eyles

  • He knew that megalomaniac Controllers were either captured or mobbed, and he had no wish to experience either.

    The Penal Cluster

    Ivar Jorgensen (AKA Randall Garrett)

  • Mark Twain was a megalomaniac; only a megalomaniac could have advertised, as he did, for post-mortem obituaries of himself.

  • Pascal violently rejected the megalomaniac pride of the Stoic philosopher.

Word Origin and History for megalomaniac

1882 (n.), 1883 (adj.), from megalomania (q.v.).

The megalomaniac differs from the narcissist by the fact that he wishes to be powerful rather than charming, and seeks to be feared rather than loved. To this type belong many lunatics and most of the great men of history. [Bertrand Russell, "The Conquest of Happiness"]
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Online Etymology Dictionary, © 2010 Douglas Harper