Meaning

• A long, narrow container, open on top, for feeding or watering animals.

  "One of Hank's chores was to slop the pigs' trough each morning and evening."

• Any similarly shaped container.

• A short, narrow canal designed to hold water until it drains or evaporates.

  "There was a small trough that the sump pump emptied into; it was filled with mosquito larvae."

• A gutter under the eaves of a building; an eaves trough.

  "The troughs were filled with leaves and needed clearing."

• A channel for conveying water or other farm liquids (such as milk) from place to place by gravity; any ‘U’ or ‘V’ cross-sectioned irrigation channel.

• A long, narrow depression between waves or ridges; the low portion of a wave cycle.

  "The buoy bobbed between the crests and troughs of the waves moving across the bay."

• A linear atmospheric depression associated with a weather front.

Meaning

• To eat in a vulgar style, as if from a trough.

  "he troughed his way through three meat pies."