noun (n)

• a nobleman (in various countries) of varying rank(noun.person)

  source: wordnet30
• a British peer of the lowest rank(noun.person)

  source: wordnet30
• a very wealthy or powerful businessman(noun.person)

  Example:
  An oil baron.
  

  Synonym:
  big businessman, business leader, king, magnate, mogul, power, top executive, tycoon
  

  source: wordnet30
• A title or degree of nobility; originally, the possessor of a fief, who had feudal tenants under him; in modern times, in France and Germany, a nobleman next in rank below a count; in England, a nobleman of the lowest grade in the House of Lords, being next below a viscount.(noun)

  source: webster1913