1. characterized by an excessive preoccupation with oneself and one's own importance; obsessively self-centered

Examples

• His egomaniacal behavior made it difficult for him to work with a team.
• The egomaniacal CEO refused to listen to any suggestions from his employees.
• She had an egomaniacal need to be the center of attention at every gathering.
• His egomaniacal worldview prevented him from understanding other people's perspectives.
• The politician's egomaniacal speeches focused entirely on his own accomplishments.
• Their egomaniacal attitudes created conflict within the group.