Final answer:
A constitutional monarchy is a term used for a king or queen who shares authority with an elected legislature and agrees to be bound by a constitution or a set of laws.
Step-by-step explanation:
A constitutional monarchy is the term used for a king or queen who shares authority with an elected legislature and agrees to be bound by a constitution or a set of laws. In this form of government, the monarch acts as the head of state and has some executive powers, but does not personally make policy. An example of a constitutional monarchy is the British monarchy, where the royal family is ceremonially headed, but the right to create policy and develop legislation belongs to the democratically elected Parliament, which acts under the leadership of a prime minister.