Apedia

Trough Low Long Area Pressure Trɒf Trɒːf Noun

Front trough
Back trough /trɒf $ trɒːf/ noun [countable]
1container a long narrow open container that holds water or food for animals:
a horse trough
2low point a short period of low activity, low prices etc OPP peak
trough of
The graph showed peaks and troughs of activity.
3waves the hollow area between two waves
4weather technical a long area of fairly low pressure between two areas of high pressure
5have your nose/snout in the trough British English if people have their noses in the trough, they are involved in something which they hope will get them a lot of money or political power – used to show disapproval

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