lock gate
/lɑk ɡeɪt/
noun
- A large door or gate that opens and closes to control the flow of water in a canal lock, allowing boats to move between different water levels.
- The lock-gate creaked open slowly as the water level in the chamber rose.
- Workers are repairing the lock-gate after it was damaged by a passing barge.
- Each lock-gate is made of heavy timber and steel to withstand the pressure of the water.