Grandiose delusions refer to a type of delusion characterized by an unrealistic belief in one's abilities, accomplishments, or importance. Synonyms for grandiose delusions include megalomania, delusions of grandeur, narcissism, self-aggrandizement, self-importance, and inflated self-esteem. These terms all describe a distorted view of oneself, where one overvalues their worth or abilities. Grandiose delusions can be symptomatic of mental health disorders such as schizophrenia, bipolar disorder, or narcissistic personality disorder. It is essential to seek medical attention if one is experiencing symptoms of grandiose delusions, as this can lead to serious consequences such as self-harm or harm to others.