A more thorough explanation:

Definition: A law-enforcement officer is someone whose job is to make sure that people follow the law and to keep the peace. They are responsible for enforcing laws and regulations, and they work to prevent crime and protect people and property.

Examples:

• A police officer
• A sheriff's deputy
• A state trooper
• A federal agent, such as an FBI agent or DEA agent

These examples illustrate the definition of a law-enforcement officer because they are all individuals who are authorized to enforce the law and maintain order. They have the power to arrest individuals who break the law, investigate crimes, and protect the public.