| Trough | n. [ OE. trough, trogh, AS. trog, troh; akin to D., G., & Icel. trog, Sw. tråg, Dan. trug; probably originally meaning, made of wood, and akin to E. tree. √63 & 241. See Tree, and cf. Trug. ] 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. [ 1913 Webster ] 2. Any channel, receptacle, or depression, of a long and narrow shape; as, trough between two ridges, etc. [ 1913 Webster ] 3. (Meteor.) The transverse section of a cyclonic area where the barometric pressure, neither rising nor falling, has reached its lowest point. [ Webster 1913 Suppl. ]
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. [ 1913 Webster ]
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