Viscount

noun

1. A nobleman ranking below an earl or count and above a baron.
2. Used as a title for such a nobleman.
3. Formerly, an officer who acted as deputy of a count or earl in the management of the affairs of the county; the sheriff of a county.
4. A degree or title of nobility next in rank below that of earl, and immediately above that of baron.
5. An officer who formerly supplied the place of the count, or earl; the sheriff of the county.