weir

• Ouvrage ou barrage de faible hauteur construit en travers d'une rivière ou d'un cours d'eau pour en réguler le niveau ou le débit, ou dispositif utilisé pour la pêche.

A noun referring to a low dam or barrier built across a river or stream to control water level or flow, or a structure used for trapping fish.

1. Low dam for water controlB2formaltechnical

   A low dam constructed across a river or stream to raise the water level or divert its flow, often used for irrigation or measurement.

   Seuil de retenue, barrage déversant

   • The engineers built a weir to regulate the river's flow.
   • Water levels are measured using a gauge at the weir.
   • The old weir diverted water to the mill.

   Synonymesbarragebarrierdamdike

2. Fish trapB2formal

   A fence or enclosure made of stakes or wattle, placed in a stream to catch or retain fish.

   Barrage de pêche / piège à poissons

   • The fishermen constructed a weir to trap salmon.
   • Ancient tribes used woven weirs for fishing.
   • The weir was repaired after the storm damaged it.