Grandiosity (noun)

A state of having or feeling a sense of greatness, superiority, or importance, often based on an exaggerated sense of one's abilities or accomplishments.

Origin:

The term 'grandiosity' is derived from the latin word 'grandiosus' which means 'grand, magnificent, impressive'.

Examples:

1. Her grandiosity made it difficult for her to accept criticism, as she saw herself as being above reproach.
2. His grandiosity caused him to overestimate his own abilities, leading to many failures in his personal and professional life.
3. The grandiosity of the dictator was clear in the way he spoke and acted, as he saw himself as being above the law.
4. The grandiosity of the young musician was quickly deflated when he was told that his performance was not up to par.
5. The grandiosity of the author was evident in the way he signed books, as he seemed to believe that his writing was on par with Shakespeare's.