A more thorough explanation:

Definition: The privy purse is the income that is reserved for the personal use of the sovereign in English law.

Example: Queen Elizabeth II receives an annual privy purse of around £82 million, which she can use for her personal expenses such as clothing, travel, and entertainment.

Explanation: The example illustrates how the privy purse is a separate income from the sovereign's official duties and is used for their personal expenses. It is important to note that the privy purse is not funded by taxpayers but comes from the Crown Estate, which is a collection of properties and assets owned by the monarch.