A more thorough explanation:

Definition: When a person or organization is required to act under a bond, they are considered bonded.

Example: A bonded court official is someone who has been required to post a bond in order to serve as an official in a court of law.

Explanation: This means that the court official has put up a certain amount of money as a guarantee that they will perform their duties honestly and responsibly. If they fail to do so, the bond can be used to compensate anyone who has been harmed by their actions. Being bonded is a way to ensure that people in positions of trust are held accountable for their actions.