Nonentity/nɑːnˈentəti/ Definition 1 of 2Pro Tip 1/3Self-Esteem Impact Can imply someone feels insignificant or overlooked, affecting their self-esteem. Surrounded by experts, she felt like a nonentity. Pro Tip 2/3Subtlety in Insult It's a subtle way to express that someone is unimportant; can be a polite insult. In the vast corporation, he was treated as a nonentity. Pro Tip 3/3Contrasting Significance Often used to describe a contrast between someone's perception and reality. Despite her success, she still felt like a nonentity at home.