A more thorough explanation:

Definition: Amendatory (-men-də-tor-ee) is an adjective that describes something that is designed or used to correct or improve something else.

Example: An amendatory rider to an insurance policy is a document that makes changes or additions to the original policy. For example, if you want to add coverage for a specific item, you might request an amendatory rider to your policy.

Explanation: The example illustrates how an amendatory document can be used to correct or improve an existing policy. In this case, the rider is used to make changes to the original insurance policy, which can help ensure that the policy provides the coverage you need.