What does "mill" mean?

Additional senses

1. 2.A machine used for expelling the juice, sap, etc., from vegetable tissues by pressure, or by pressure in combination with a grinding, or cutting process; as, a cider mill; a cane mill.
2. 3.A machine for grinding and polishing; as, a lapidary mill.
3. 4.A common name for various machines which produce a manufactured product, or change the form of a raw material by the continuous repetition of some simple action; as, a sawmill; a stamping mill, etc.
4. 5.A building or collection of buildings with machinery by which the processes of manufacturing are carried on; as, a cotton mill; a powder mill; a rolling mill.
5. 6.(Die Sinking) A hardened steel roller having a design in relief, used for imprinting a reversed copy of the design in a softer metal, as copper.
6. 7.(Mining) (a) An excavation in rock, transverse to the workings, from which material for filling is obtained. (b) A passage underground through which ore is shot.
7. 8.A milling cutter. See Illust. under Milling.
8. 9.A pugilistic. [Cant] R. D. Blackmore. Edge mill, Flint mill, etc. See under Edge, Flint, etc. -- Mill bar (Iron Works), a rough bar rolled or drawn directly from a bloom or puddle bar for conversion into merchant iron in the mill. -- Mill cinder, slag from a puddling furnace. -- Mill head, the head of water employed to turn the wheel of a mill. -- Mill pick, a pick for dressing millstones. -- Mill pond, a pond that supplies the water for a mill. -- Mill race, the canal in which water is conveyed to a mill wheel, or the current of water which drives the wheel. -- Mill tail, the water which flows from a mill wheel after turning it, or the channel in which the water flows. -- Mill tooth, a grinder or molar tooth. -- Mill wheel, the water wheel that drives the machinery of a mill. -- Roller mill, a mill in which flour or meal is made by crushing grain between rollers. -- Stamp mill (Mining), a mill in which ore is crushed by stamps. -- To go through the mill, to experience the suffering or discipline necessary to bring one to a certain degree of knowledge or skill, or to a certain mental state.
9. 10.To reduce to fine particles, or to small pieces, in a mill; to grind; to comminute.
10. 11.To shape, finish, or transform by passing through a machine; specifically, to shape or dress, as metal, by means of a rotary cutter.
11. 12.To make a raised border around the edges of, or to cut fine grooves or indentations across the edges of, as of a coin, or a screw head; also, to stamp in a coining press; to coin.
12. 13.To pass through a fulling mill; to full, as cloth.
13. 14.To beat with the fists. [Cant] Thackeray.
14. 15.To roll into bars, as steel. To mill chocolate, to make it frothy, as by churning.
15. 16.To swim under water; -- said of air-breathing creatures.