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. &?; & 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.

2. Any channel, receptacle, or depression, of a long and narrow shape; as, trough between two ridges, etc.

Trough (?), n. (Meteor.) The transverse section of a cyclonic area where the barometric pressure, neither rising nor falling, has reached its lowest point.

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. &?; & 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.

2. Any channel, receptacle, or depression, of a long and narrow shape; as, trough between two ridges, etc.

Trough (?), n. (Meteor.) The transverse section of a cyclonic area where the barometric pressure, neither rising nor falling, has reached its lowest point.

English
Noun
• A long, narrow container for feeding or watering animals.
  
• A gutter under the eaves of a building; eaves-troughs.
  
• A long, narrow depression between waves or ridges.
  
• # The valley between waves on the ocean.
  
• (meteorology) A linear atmospheric depression associated with a weather front.
  
  Translation