noun
Refers to a supreme ruler, especially in historical or absolute monarchy contexts. Often used in titles like 帝王学 (the study of kingship) or figuratively for a dominant figure in a field.
古代ローマの帝王は絶大な権力を持っていた。
The emperors of ancient Rome held immense power.
彼は業界の帝王と呼ばれている。
He is called the king of the industry.