Entry Word: trough

Function: noun

Meaning: 1 a long hollow cylinder for carrying a substance (as a liquid or gas) <all of the wiring for the converted residential loft is concealed in a vertical trough> — see pipe 1
2 a long narrow channel dug in the earth <I slid and fell into the trough by the side of the road, scraping my leg> — see ditch
3 a pipe or channel for carrying off water from a roof <the troughs on the eaves of the house were clogged with leaves> — see gutter 1