baron

Short definition from Wiktionary

Noun

1. 1
   The male ruler of a barony.
2. 2
   A male member of the lowest rank of English nobility (the equivalent rank in Scotland is lord).
3. 3
   A person of great power in society, especially in business and politics.
4. 4
   A prisoner who gains power and influence by lending or selling goods such as tobacco.
5. 5
   A baron of beef, a cut made up of a double sirloin.
6. 6
   Any of various nymphalid butterflies of the genus Euthalia.
7. 7
   A husband.

Proper noun

1. 1
   A surname from French
2. 2
   A surname from German
3. 3
   A surname from Polish
4. 4
   A surname from Ukrainian