weir
n. countable C1 Advanced US //ˈwiɹ// UK //wˈiə// weir
n. a small wall or barrier built across a river. It is used to control the flow of water or to help catch fish.
n. a low dam built across a river to raise the level of water upstream or regulate its flow. Often used in hydraulic engineering or as a fixed structure for trapping fish.
Water flows smoothly over the stone weir.
The local council repaired the ancient stone weir to prevent the river from drying up during the summer.
Engineers monitored the weir closely during the spring thaw, ensuring that the increased volume of meltwater did not compromise the structural integrity of the riverbank.
Usage
Commonly used in the context of civil engineering, environmental management, and traditional fishing.