Meaning of TROUGH in English

TROUGH

trough /trɒf $ trɒːf/ BrE AmE noun [countable]

[ Language: Old English ; Origin: trog ]

1 . CONTAINER a long narrow open container that holds water or food for animals:

a horse trough

2 . LOW POINT a short period of low activity, low prices etc OPP peak

trough of

The graph showed peaks and troughs of activity.

3 . WAVES the hollow area between two waves

4 . WEATHER technical a long area of fairly low pressure between two areas of high pressure

5 . have 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

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.