A more thorough explanation:

Definition: Dum se bene gesserit is a Latin phrase that means "while he behaves himself properly." It was used historically to refer to a period of good conduct.

Example: The king promised to grant the nobleman a title and land, but only "dum se bene gesserit," meaning that the nobleman would only receive these rewards if he behaved properly and fulfilled his duties.

Explanation: This example illustrates how the phrase was used historically to set conditions for rewards or privileges. The nobleman would only receive the title and land if he behaved properly, showing good conduct and fulfilling his duties. The phrase was used to emphasize the importance of good behavior and to hold people accountable for their actions.