Trough may refer to:

Look up trough in Wiktionary, the free dictionary.

• Trough (geology), a long depression less steep than a trench
• Trough (meteorology), an elongated region of low atmospheric pressure
• Trough (physics), the lowest point on a wave
• Trough level (medicine), the lowest concentration of a medicine is present in the body over time
• Langmuir-Blodgett trough, a laboratory instrument

• Trough (economics), the lowest turning point of a business cycle
• as metaphor for political corruption, in the contexts of crony capitalism, nepotism, and public economics

• Bread trough or dough trough, rectangular receptacle with a shallow basin, used in breadmaking
• Trough (barony), a historical barony in County Monaghan, Ireland
• Trough (food) or manger, a container for animal feed
• Watering trough, a receptacle of drinking water for domestic and non-domestic livestock
• Water trough, a trough used to supply water to steam locomotives.
• Battle of the Trough, a 1756 skirmish of the French and Indian War in West Virginia
• Sleightholme Beck Gorge - The Troughs, a Site of Special Scientific Interest in the Teesdale district of south-west County Durham, England
• The Trough, a gorge carved by the South Branch Potomac River in West Virginia
• "Down the trough", as used by Donegal Gaelic football club Cill Chartha
• Trough, an old word for an inkwell

• Trow, a type of cargo boat
• Troff, a document processing system developed by AT&T for the Unix operating system
• "Tropho-", a Greek root meaning to feed or grow
• Trough urinal, a long urinal for many men

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