1. A movable barrier or gate used to control the flow of water in canals, dams, or irrigation systems
The engineer opened the floodgate to release water from the reservoir.
O engenheiro abriu a comporta para liberar água do reservatório.
2. Any hinged or sliding door or gate that can be opened and closed
He closed the wooden gate behind him.
Ele fechou a comporta de madeira atrás de si.