Viscount

1. a. A nobleman of the fourth rank, next in order below an earl and next above a baron; also, his degree or title of nobility. See Peer, n., 3.
2. a. An officer who formerly supplied the place of the count, or earl; the sheriff of the county.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.