Definitions

1. noun

A gate or valve at the head of a canal, reservoir, or watercourse, used to control the flow of water.

“The headgate was closed to prevent flooding downstream.”

2. noun

A device, especially for a fisherman, that controls the flow of water, used to attract or hold fish.

“The headgate was set to allow just enough water to flow through to attract the trout.”

3. verb

To control or regulate the flow of water through a headgate.

“The engineer had to headgate the canal to prevent a surge in water levels.”