Etymology: Middle English mille, from Old English mylen, from Late Latin molina, molinum, from feminine and neuter of molinus of a mill, of a millstone, from Latin mola mill, millstone; akin to Latin molere to grind — more at meal
Date: before 12th century
1: a building provided with machinery for grinding grain into flour 2 a: a machine or apparatus (as a quern) for grinding grain b: a machine for crushing or comminuting 3: a machine that manufactures by the continuous repetition of some simple action 4: a building or collection of buildings with machinery for manufacturing 5 a: a machine formerly used for stamping coins b: a machine for expelling juice from vegetable tissues by pressure or grinding 6:milling machine, milling cutter 7 a: a slow, laborious, or mechanical process or routine b: one that produces or processes people or things mechanically or in large numbers <a diploma mill><a rumor mill> 8: a difficult and often educational experience —used in the phrase through the mill 9: the engine of an automobile or boat