Definition of "waste-gate" [waste-gate]

• A gate for letting the water of a dam or pond pass off. (noun)

The Century Dictionary (Public Domain)

• "You add that the water may be allowed to flow freely through the waste-gate, provided the opening of such a waste-gate shall not deprive the mill of the necessary supply of water."
• "The back pressure is reduced when turbo boost is not necessary by opening the waste-gate, which improves fuel efficiency."
• "By adapting the motor-driven electrical waste-gate, the boost pressure is precisely controlled."