An exaggerated sense of one’s own importance or ability that often occurs in mania. Megalomania may take the form of a delusion of grandeur, or of a desire to organize activities that are expensive, large in scale, and involve many people. Health Source: BMA Medical Dictionary Author: The British Medical Association
A delusion of grandeur or an insane belief in a person’s own extreme greatness, goodness, or power. Health Source: Medical Dictionary Author: Health Dictionary
n. an obsolete word for delusions of grandeur, such as being God, royalty, etc. It may be a feature of a schizophrenic or manic illness. Health Source: Oxford | Concise Colour Medical Dictionary Author: Jonathan Law, Elizabeth Martin