Definitions of mill:

• noun:   machine that processes materials by grinding or crushing
• noun:   English philosopher and economist remembered for his interpretations of empiricism and utilitarianism (1806-1873)
• noun:   Scottish philosopher who expounded Bentham's utilitarianism; father of John Stuart Mill (1773-1836)
• noun:   the act of grinding to a powder or dust
• noun:   a plant consisting of buildings with facilities for manufacturing
• verb:   grind with a mill

  Example: "Mill grain"

• verb:   roll out (metal) with a rolling machine
• verb:   produce a ridge around the edge of

  Example: "Mill a coin"

• verb:   move about in a confused manner
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #16068)