Definition of "under-king" [under-king]

• An inferior or subordinate king. (noun)

The Century Dictionary (Public Domain)

• "Now he commands you to divide your secret treasures and your ancestors 'wealth quickly with him, and you shall be his under-king, if you desire to live, because you do not have the power to withstand him."
• "There was a high king of shadowy power, whose sway was vaguely recognized as extending over the island, but whose practical supremacy was challenged on every hand by whatever king or under-king felt the fierce whim seize him."
• "I was satisfied with the crown of an under-king, satisfied to pass the time as I had been doing."