1. A long, narrow, generally shallow receptacle for holding water or feed for animals.
2. any of various similar containers for domestic or industrial use, such as kneading or washing.
3. A gutter under the eaves of a roof.
4. A long, narrow depression, as between waves or ridges.
5. A low point in a business cycle or on a statistical graph.
6. meteorology an elongated region of relatively low atmospheric pressure, often associated with a front.
7. physics A minimum point in a wave or an alternating signal.

1. A long, narrow container, open on top, for feeding or watering animals.
2. any similarly shaped container.
3. A short, narrow canal designed to hold water until it drains or evaporates.
4. A gutter under the eaves of a building; an eaves trough.
5. A channel for conveying water or other farm liquids (such as milk) from place to place by gravity; any ‘U’ or ‘V’ cross-sectioned irrigation channel.
6. A long, narrow depression between waves or ridges; the low portion of a wave cycle.
7. A linear atmospheric depression associated with a weather front.
8. to eat in a vulgar style, as if eating from a trough

1. A long, hollow vessel, generally for holding water or other liquid, especially one formed by excavating a log longitudinally on one side; a long tray; also, a wooden channel for conveying water, as to a mill wheel.
2. any channel, receptacle, or depression, of a long and narrow shape.
3. the transverse section of a cyclonic area where the barometric pressure, neither rising nor falling, has reached its lowest point.

1. to feed grossly, as a hog from a trough.
2. to make into a trough, or into the shape of a trough.
3. 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.
4. in coalmining, a passage cut through a supporting pillar of coal to connect one opened chamber with another. also called thirling.
5. in geology, the lowest portion of a synclinal fold.
6. an open receptacle, generally long and narrow, as for water.
7. A large vessel, usually oblong, designed to hold water or food for animals.
8. A conduit for rain-water, placed under the eaves of a building; an eaves-trough.
9. in printing:
10. A watertight box in which paper is dipped to dampen it for the press.
11. the iron or metal-lined box in which inking-rollers are cleaned and forms are washed.
12. in fish-culture, a hatching-trough.
13. A small boat; a canoe or dug-out.
14. A concavity or hollow; a depression between two ridges or between two waves; an oblong basin-shaped hollow: as, the trough of the sea.
15. 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.
16. in chem., a vat or pan containing water over which gas is distilled.
17. in electroplating, a tray or vat which holds the metallic solution.
18. 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.

1. a long narrow shallow receptacle
2. a container (usually in a barn or stable) from which cattle or horses feed
3. a treasury for government funds
4. a concave shape with an open top
5. a narrow depression (as in the earth or between ocean waves or in the ocean bed)
6. a channel along the eaves or on the roof; collects and carries away rainwater