1. plural of weir; low dams built across rivers or streams to control water flow or raise water levels

Examples

• The ancient weirs along the river helped control flooding during heavy rains.
• Fish ladders were built alongside the weirs to help salmon migrate upstream.
• The mill owner constructed several weirs to power his water wheels.
• Environmental groups argued that removing old weirs would restore natural river flow.
• The stone weirs had been in place for over two centuries.
• Engineers inspected the weirs for damage after the storm.