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trough (noun) the lowest part of a wave; a tub-like container for animals for drinking water for animals.
The lowest part of a curve or a wave is a trough. It is the opposite of crest, the highest point of wave or a cure. By extension it means the lowest part of something, when it is at the lowest level. The trough of a country’s economy is the lowest level of the finances of the country. A tub-like container for water for animals to drink from is also a trough. A trough is long and narrow and is used for giving drinking water to animals.
- During the World War II, the economies of most European countries were at their trough. The countries experienced the worst financial position during the period.
- His popularity touched the trough of his career, when, found guilty of murder of his wife he was sentenced to death. His popularity sank to the lowest level with his conviction.