'Viscount' definitions:

Definition of 'viscount'

From: WordNet
noun
(in various countries) a son or younger brother or a count
noun
A British peer who ranks below an earl and above a baron

Definition of 'Viscount'

From: GCIDE
  • Viscount \Vis"count`\, n. [OE. vicounte, OF. visconte, vescunte, F. vicomte, LL. vicecomes; L. vice (see Vice, a.) + comes a companion, LL., a count. See Count.]
  • 1. (O. Eng. Law) An officer who formerly supplied the place of the count, or earl; the sheriff of the county. [1913 Webster]
  • 2. 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. [Eng.] --Chaucer. [1913 Webster]