trough /ˈtrɔf, ˈtrɔθ, ||ˈtro/
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; as, trough between two ridges, etc.
3. Meteor. The transverse section of a cyclonic area where the barometric pressure, neither rising nor falling, has reached its lowest point.
Trough gutter Arch., a rectangular or V-shaped gutter, usually hung below the eaves of a house.
Trough of the sea, the depression between two waves.
n 1: a narrow depression (as in the earth or between ocean waves
or in the ocean bed)
2: a channel along the eaves or on the roof; collects and
carries away rainwater [syn: gutter]
3: a concave shape with an open top [syn: bowl]
4: a treasury for government funds [syn: public treasury, till]
5: a long narrow shallow receptacle
6: a container (usually in a barn or stable) from which cattle
or horses feed [syn: manger]