n. The small trees and shrubs of a wood; a thicket of small trees; scrub.n. Branches of trees lopped off; brushwood: a sense common in the United States.n. A tract of country covered by thickets; hence, a thinly settled country; the backwoods.n. An instrument of various forms, according to its intended use, consisting of a quantity of some flexible material attached to a handle or stock.n. Anything resem bling a brush, as the tails of some animals, as the fox, or the panicles of broom-corn used in the manufacture of brooms.n. An agricultural instrument made of small trees, as the birch, and used instead of a harrow for covering grain, grass-seed, etc., after they have been sown.n. In dynamo-electric machines (which see, under electric), one of the bundles of copper wires or plates which are in contact with the commutator of the armature on opposite sides, and serve to take off the positive and negative currents of electricity generated.n. In electricity, the luminous phenomenon, consisting of diverging rays of pale-blue light, observed when the discharge of an electric machine takes place into the air from a small ball or rounded point.n. [From the verb.] A passage; especially, a quick ride through the brush or across country; a chase.n. A skirmish; a slight encounter; a shock; a collision: as, to have a brush with the enemy.n. An application of a brush, as in sweeping or dusting; a brushing; a removal as if with a brush: as, give my hat a brush.n. painter; one who uses a brush: as, a brother brush.To sweep or rub with a brush: as, to brush a hat.To remove by brushing or by lightly passing over: as, to brush off dust.To sweep or touch as with a brush; strike lightly bypassing over the surface; pass lightly over: as, to brush the arm in passing.Figuratively, to ruffle; excite.To furnish with brushes or branches of dead trees to climb on:To move quickly or in haste; rush: as, to brush past a person.To move or skim over with a slight contact, as a brush.n. One of the ends of the stationary circuit of an electric machine which receive the current from or supply it to the revolving circuit: so called because they had formerly a brush-like structure.n. The hair on the upper end of a grain of wheat. It furnishes a distinction between varieties.n. a gilder's brush of brass wire used for spreading gilding and for cleaning metal surfacesn. a brush made with iron wires used for street-sweepingn. a carding brush; etc.In mining, to remove, by blasting or otherwise, rock from (the floor or roof of a level or roadway) to increase its height.