1. a long, narrow container used to hold food or water for animals
2. a long, narrow depression or hollow, especially between waves or hills
3. the lowest point in a cycle or pattern

Examples

• The horses drank water from the metal trough.
• Pigs gathered around the feeding trough at dinner time.
• The boat rode through the trough between two large waves.
• The economic data showed the country was in a deep trough.
• Rain collected in the trough along the roof’s edge.
• The valley formed a natural trough between the mountains.
• Stock prices hit a trough before beginning to recover.