Meaning of the word "delusions of grandeur" in English

What does "delusions of grandeur" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

delusions of grandeur

US /dɪˈluːʒənz əv ˈɡrændʒər/
UK /dɪˈluːʒənz əv ˈɡrændʒər/

Phrase

a false impression of one's own importance, power, or wealth

Example:
He suffers from delusions of grandeur, believing he's destined to rule the world.
Her constant boasting about her achievements suggests she might have delusions of grandeur.