誇大妄想

(1)a psychological state characterized by delusions of grandeur

(2)誇大妄想をもつ心理状態

(3)a delusion (common in paranoia) that you are much greater and more powerful and influential than you really are

(4)自分が現実よりも偉大で権力があり、影響力を持っていると信じる妄想（妄想症に一般的）