n.1. a.  A British nobleman of the lowest rank.
b.  A nobleman of continental Europe, ranked differently in various countries.
c.  A Japanese nobleman of the lowest rank.
d.  Used as the title for such a nobleman.
 2. a.  A feudal tenant holding his rights and title directly from a king or another feudal superior.
b.  A lord or nobleman; a peer.
 3.  One having great wealth, power, and influence in a specified sphere of activity: an oil baron.
4.  A cut of beef consisting of a double sirloin.