megalomania
noun
meg·a·lo·ma·nia
ˌme-gə-lō-ˈmā-nē-ə 
-nyə
1
: a mania (see mania sense 2a) for great or grandiose performance
an outburst of wildly extravagant commercial megalomania—
The Times Literary Supplement (London)
The Times Literary Supplement (London)2
: a delusional mental illness that is marked by feelings of personal omnipotence and grandeur
Examples of megalomania in a Sentence
Their CEO has an arrogance that borders on megalomania.
Recent Examples on the Web
Mike’s got some serious megalomania problems.
—Lauryn Overhultz, FOXNews.com, 21 Aug. 2025
That this is offered as an amusing example of flair and determination instead of a warning about subterfuge and megalomania means that Hare has either fallen under the Great Man’s spell or wants to make sure the audience has.
—Jesse Green, New York Times, 26 Oct. 2022
Some of these clips are obscure; many more are world-famous stunts of rock-star megalomania.
—Rob Sheffield, Rolling Stone, 16 Sep. 2022
What really changed things was not Trump, but Putin’s megalomania.
—Tom McTague, The Atlantic, 2 July 2022
See All Example Sentences for megalomania
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Lauryn Overhultz, FOXNews.com, 21 Aug. 2025
That this is offered as an amusing example of flair and determination instead of a warning about subterfuge and megalomania means that Hare has either fallen under the Great Man’s spell or wants to make sure the audience has.
—Jesse Green, New York Times, 26 Oct. 2022
Some of these clips are obscure; many more are world-famous stunts of rock-star megalomania.
—Rob Sheffield, Rolling Stone, 16 Sep. 2022
What really changed things was not Trump, but Putin’s megalomania.
—Tom McTague, The Atlantic, 2 July 2022
See All Example Sentences for megalomania
Cite this Entry
“Megalomania.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/megalomania. Accessed 31 Oct. 2025.
Copy CitationMedical Definition
megalomania
noun
meg·a·lo·ma·nia
ˌmeg-ə-lō-ˈmā-nē-ə, -nyə
: a delusional mental illness that is marked by feelings of personal omnipotence and grandeur
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