Medically reviewed by Kira Graves, PhD Delusions of grandeur are false beliefs in which people think they are God-like, powerful, or invincible.A person with grandiose delusions can be angry and ...

Terms such as delusions or conspiracy theories express a disapproving attitude. Suppose I am convinced that a celebrity I have never met is in love with me. My belief may be considered delusional. To ...

A shipping clerk begins to think he’s been given a secret task of geopolitical significance. A government employee believes that descriptions of a certain actor in the newspaper are actually about her ...