mill¹ (mĭl)

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[Middle English milne, mille, from Old English mylen, from Late Latin molīna, molīnum, from feminine and neuter of molīnus, of a mill, from Latin mola, millstone, from molere, to grind.]

noun 

1. 1. A building equipped with machinery for grinding grain into flour or meal.
   2. A device or mechanism that grinds grain.
2. A machine or device that reduces a solid or coarse substance into pulp or minute grains by crushing, grinding, or pressing: a pepper mill.
3. A machine that releases the juice of fruits and vegetables by pressing or grinding: a cider mill.
4. 1. A machine, such as one for stamping coins, that produces something by the repetition of a simple process.
   2. A steel roller bearing a raised design, used for making a die or a printing plate by pressure.
   3. Any of various machines for shaping, cutting, polishing, or dressing metal surfaces.
5. 1. A building or group of buildings equipped with machinery for processing raw materials into finished or industrial products: a textile mill; a steel mill.
   2. A building or collection of buildings that has machinery for manufacture; a factory.
6. A process, agency, or institution that operates in a routine way or turns out products in the manner of a factory: The college was nothing more than a diploma mill.
7. A slow or laborious process: It took three years to get the bill through the legislative mill.

verb: milled, mill·ing, mills. 

transitive verb 

1. To grind, pulverize, or break down into smaller particles in a mill.
2. To transform or process mechanically in a mill.
3. To shape, polish, dress, or finish in a mill or with a milling tool.
4. 1. To produce a ridge around the edge of (a coin).
   2. To groove or flute the rim of (a coin or other metal object).
5. To agitate or stir until foamy.
6. Western U.S. To cause (cattle) to move in a circle or tightening spiral in order to stop a stampede.

intransitive verb 

1. To move around in churning confusion: “A crowd of school children milled about on the curb looking scared” (Anne Tyler)
2. Slang To fight with the fists; box.
3. To undergo milling.

mill² (mĭl)

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[Short for Latin mīllēsimus, thousandth; see mil¹.]

noun 

A monetary unit equal to of a U.S. dollar or of a cent.