1. a channel or passage that allows excess water to flow away from a dam or reservoir
Usage: engineering

Examples

• The spillway prevented the dam from overflowing during heavy rains.
• Engineers opened the spillway to release water from the reservoir.
• The concrete spillway channeled excess water safely downstream.
• Water rushed through the spillway at tremendous speed.
• The dam’s spillway was designed to handle flood conditions.
• Maintenance crews inspected the spillway for cracks and damage.