📒 a long, narrow open container for animals to eat or drink from
📒 a long narrow region of low air pressure between two regions of higher pressure
📒 a period of time when the level of something is low, especially a time when a business or the economy is not growing
📒 a low area between two waves in the sea, or two hills
📒 if you say that people have their noses in the trough, you mean that they are trying to get a lot of money for themselves