a narrow depression (as in the earth or between ocean waves or in the ocean bed)
"The diver carefully navigated through the deep trough between two massive rolling swells to avoid getting caught in the whitewater."
a treasury for government funds
"The new budget legislation opened the national trough to emergency grants for disaster relief."
a long narrow shallow receptacle
"The farmer filled the trough with fresh hay for the horses to eat from."
A long, narrow container, open on top, for feeding or watering animals.
"The farmer filled the wooden trough with fresh hay so the horses could eat during their morning break."
To eat in a vulgar style, as if from a trough.
"After hours of running through the mud, the dogs began to devour their kibble like they were being fed straight out of a trough."