megalomania
/ˌmɛɡəloʊˈmeɪniə/
noun
- A mental condition in which a person has an exaggerated sense of their own power, importance, or abilities; often used figuratively to describe extreme ambition or arrogance.
- His megalomania made it impossible for him to accept any criticism.
- The dictator's megalomania led him to believe he could conquer the entire continent.
- Some historians argue that the emperor's megalomania contributed to the empire's downfall.
Synonyms