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
Both attitudes—the inferiority, the megalomania—are dangerous.
—Simon Akam, New Yorker, 1 Dec. 2025
Absurdity and megalomania satire ensue.
—Georg Szalai, HollywoodReporter, 14 Nov. 2025
In other words, giant data centers don't exist only because of Mark Zuckerberg's megalomania.
—PC Magazine, 1 Nov. 2025
Mike’s got some serious megalomania problems.
—Lauryn Overhultz, FOXNews.com, 21 Aug. 2025
See All Example Sentences for megalomania
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Simon Akam, New Yorker, 1 Dec. 2025
Absurdity and megalomania satire ensue.
—Georg Szalai, HollywoodReporter, 14 Nov. 2025
In other words, giant data centers don't exist only because of Mark Zuckerberg's megalomania.
—PC Magazine, 1 Nov. 2025
Mike’s got some serious megalomania problems.
—Lauryn Overhultz, FOXNews.com, 21 Aug. 2025
See All Example Sentences for megalomania
Cite this Entry
“Megalomania.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/megalomania. Accessed 10 Dec. 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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