1. the office, jurisdiction, or tenure of a sheriff
2. the territorial area under a sheriff’s authority

Examples

• He was appointed to the sheriffdom of the county last year.
• The sheriffdom covered three rural townships.
• During his sheriffdom, crime rates decreased significantly.
• The boundaries of the sheriffdom were clearly marked on the map.
• She inherited the sheriffdom from her predecessor.
• The sheriffdom included both urban and rural areas.