A more thorough explanation:

The power of revocation refers to the legal right or authorization to alter, by an act of will, the rights, duties, liabilities, or other legal relations either of that person or of another. It is a power that a person reserves in an instrument (such as a trust) to revoke the legal relationship that the person has created.

For example, if a person creates a trust and reserves the power of revocation, they have the ability to change or cancel the trust at any time. This power is important because it allows the person to make changes to the trust if their circumstances or wishes change.

Another example of the power of revocation is a power of attorney. If a person grants someone else the power to act on their behalf, they may also reserve the power to revoke that authority if they no longer want that person to act on their behalf.

In summary, the power of revocation is the legal right to change or cancel a legal relationship that a person has created. It is an important power that allows people to make changes to their legal arrangements if their circumstances or wishes change.