#1 trough n. a narrow depression (as in the earth or between ocean waves or in the ocean bed). wn
#2 trough n. [gutter] a channel along the eaves or on the roof; collects and carries away rainwater. wn
#3 trough n. [bowl] a concave shape with an open top. wn
#4 trough n. [public treasury, till] a treasury for government funds. wn
#5 trough n. a long narrow shallow receptacle. wn
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