What is the definition of monarchy?

Its a form of government with a king or queen like figure controlling it.

Explanation:

if it is a constitutional monarchy then the monarch is limited in power.

A monarch, such as a king or queen, rules a kingdom or empire. In a constitutional monarchy, the monarch's power is limited by a constitution. But in an absolute monarchy, the monarch has unlimited power. Monarchy is an old form of government, and the word has been around a long time. It derives from Greek monarkhiā, from monarkhos, "monarch."