n.
1.a narrow depression (as in the earth or between ocean waves or in the ocean bed)
2.a channel along the eaves or on the roof
3.a concave shape with an open top
4.a treasury for government funds
5.a long narrow shallow receptacle
6.a container (usually in a barn or stable) from which cattle or horses feed
Idiom of the Day
act as a guinea pig
to allow some kind of test to be performed on someone
I was not happy to act as a guinea pig on the new training material.