n. In mining, an oblong tank of boards or metal in which ores are washed for the separation of metal and gangue; a rocker, serving as a hand-buddle.n. In coalmining, a passage cut through a supporting pillar of coal to connect one opened chamber with another. Also called thirling.n. In geology, the lowest portion of a synclinal fold.n. An open receptacle, generally long and narrow, as for water.n. A large vessel, usually oblong, designed to hold water or food for animals.n. A conduit for rain-water, placed under the eaves of a building; an eaves-trough.n. In printing:n. A watertight box in which paper is dipped to dampen it for the press.n. The iron or metal-lined box in which inking-rollers are cleaned and forms are washed.n. In fish-culture, a hatching-trough.n. A small boat; a canoe or dug-out.n. A concavity or hollow; a depression between two ridges or between two waves; an oblong basin-shaped hollow: as, the trough of the sea.n. The array of connected cells of a voltaic battery, in which the copper and zinc plates of each pair are on opposite sides of the partition.n. In chem., a vat or pan containing water over which gas is distilled.n. In electroplating, a tray or vat which holds the metallic solution.n. A similar device for holding the developing or fixing bath in dry-plate photography, in order that the changes in the plate submerged in the bath can be observed.To feed grossly, as a hog from a trough.To make into a trough, or into the shape of a trough.