Definitions of bourbon:

• noun:   whiskey distilled from a mash of corn and malt and rye and aged in charred oak barrels
• noun:   a European royal line that ruled in France (from 1589-1793) and Spain and Naples and Sicily
• noun:   a member of the European royal family that ruled France
• noun:   a reactionary politician in the United States (usually from the South)
• name:  A surname (very rare: popularity rank in the U.S.: #22437)