delusion

delusions of grandeur

Unrealistic beliefs about the amount of power and influence one has. You're just an intern, so you definitely have delusions of grandeur if you think the boss is going to listen to you!

See also: delusion, of

labor under the delusion of/that

To live, operate, or function with the unyielding belief in something, especially that which is fanciful, unrealistic, or untrue. Primarily heard in US. Jeremy's always labored under the delusion of being a great writer, even though he's never written more than a few crummy poems. No one likes paying taxes, but those who would call for them to be done away with altogether are laboring under the delusion that our society can function without them!

See also: delusion, labor, of, that

Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

delusions of grandeur

a false impression of your own importance.

This expression is the equivalent of the French phrase folie de grandeur , which came into English in the late 19th century and is still used today.

See also: delusion, of

Farlex Partner Idioms Dictionary © Farlex 2017

delusions of ˈgrandeur

(often humorous) a belief that you are more important than you really are: He’s been suffering from delusions of grandeur ever since he became manager.

See also: delusion, of

Farlex Partner Idioms Dictionary © Farlex 2017