Sheriff (noun)

1. The chief law enforcement officer of a county or state in the United States.
2. A senior official appointed by the Crown to maintain order in a county.
3. An official appointed to enforce the law in a particular area or district.

Origin:

Old english scirgerefa, literally "shire-reeve", from scir "shire" + gerefa "reeve", originally a local official appointed by the king, later the chief law enforcement officer of a county or state.

Examples:

1. The sheriff was elected by the citizens of the county.
2. The sheriff is the highest law enforcement officer in the county.
3. The sheriff's department is responsible for maintaining law and order.
4. The sheriff is in charge of the county jail.
5. The sheriff's deputies assist the sheriff in carrying out his duties.