1. an artificial water channel with a gate or valve for controlling the flow of water

Examples

• The dam's sluiceway was opened to release excess water downstream.
• Engineers inspected the concrete sluiceway for cracks after the flood.
• Water rushed through the narrow sluiceway with tremendous force.
• The old mill used a wooden sluiceway to direct water to the wheel.
• Workers cleared debris from the sluiceway to restore proper flow.
• The sluiceway's metal gates were raised during the spring thaw.