(informal)self-importance; conceitedness.(informal)self-importance; conceitedness. Now, this isn't bigheadedness as far as we're concerned. iZones of Control and Responsibility of Governments (3 Jan. 60)(informal)self-importance; conceitedness. Now, this isn't bigheadedness as far as we're concerned. ?Zones of Control and Responsibility of Governments (3 Jan. 60)