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A machine for grinding or commuting any substance, as grain, by rubbing and crushing it between two hard, rough, or intented surfaces; as, a gristmill, a coffee mill; a bone mill.

The act or employment of grinding or passing through a mill; the process of fulling; the process of making a raised or intented edge upon coin, etc.; the process of dressing surfaces of various shapes with rotary cutters. See Mill. High milling, milling in which grain is reduced to flour by a succession of crackings, o…

One of two circular stones used for grinding grain or other substance. No man shall take the nether or the upper millstone to pledge. Deut. xxiv. 6.

Having power to grind; grinding; as, the molar teeth; also, of or pertaining to the molar teeth. Bacon.

A stone or thick lump of glass, or kind of pestle, flat at the bottom, used for grinding pigments or drugs, etc., upon a slab of similar material.

The toll for grinding grain. Erskine.

To chew with a grinding, crunching sound, as a beast chews provender; to chew deliberately or in large mouthfuls. [Formerly written also maunch and mounch.] I could munch your good dry oats. Shak.

teel blade and no cutting edge, rounded at the end, used by painters to mix colors on the grinding slab or palette. -- To set the palette (Paint.), to lay upon it the required pigments in a certain order, according to the intended use of them in a picture. Fairholt.

A polishing or grinding implement or instrument.

The substance of apples, or of similar fruit, crushed by grinding.

A circular hole formed in the rocky beds of rivers by the grinding action of stones or gravel whirled round by the water in what was at first a natural depression of the rock.

The fine particles to which any dry substance is reduced by pounding, grinding, or triturating, or into which it falls by decay; dust. Grind their bones to powder small. Shak.

-- Mesne process. See under Mesne. -- Process milling, the process of high milling for grinding flour. See under Milling. -- Reversible process (Thermodynamics), any process consisting of a cycle of operations such that the different operations of the cycle can be performed in reverse order with a reversal of their…

A pug mill. Pug mill, a kind of mill for grinding and mixing clay, either for brickmaking or the fine arts; a clay mill. It consists essentially of an upright shaft armed with projecting knives, which is caused to revolve in a hollow cylinder, tub, or vat, in which the clay is placed.

To reduce of fine powder or dust, as by beating, grinding, or the like; as, friable substances may be pulverized by grinding or beating, but to pulverize malleable bodies other methods must be pursued.

A mill for grinding grain, the upper stone of which was turned by hand; -- used before the invention of windmills and watermills. Shak. They made him at the querne grind. Chaucer.

To bring to a certain state or condition by grinding, pounding, kneading, rubbing, etc.; as, to reduce a substance to powder, or to a pasty mass; to reduce fruit, wood, or paper rags, to pulp. It were but right And equal to reduce me to my dust. Milton.

Tripoli (from the country from which it was formerly brought), used in all sorts of finer grinding and polishing in the arts, and for cleaning metallic substances. The name is also given to other friable siliceous stones applied to like uses.

A movable slab or rubber used in grinding or polishing a surface of stone.

Matter found in troughs of grindstones after the grinding of edge tools. [Prov. Eng.] Sir W. Petty.