The idiom "changing of the guard" refers to a formal ceremony where one group of guards replaces another group of guards. It is often used to describe a situation where there is a change in leadership or a transfer of power from one person or group to another.
For example, if a company's CEO retires and a new CEO is appointed, you could say that there has been a changing of the guard. Similarly, if a political party loses an election and a new party takes power, you could say that there has been a changing of the guard in the government.
The phrase can also be used more generally to describe any situation where there is a significant change or shift in power, influence, or authority. It is often used in a formal or serious context, but can also be used in a more casual way.
Overall, the idiom "changing of the guard" is a way to describe a significant transition or change in leadership or power.
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