a passing that carries a current of water and has an opening, called a sluice-gate, which can be opened and closed to control the flow of water, a water channel equipped with means of controlling the flow, enabling a sudden rush of water to be used at harbours or canal locks for the purpose of cleaning out silt, mud etc obstructing navigation, tehniliselt erineva veetasemega veekogude või veekogu osade vahel paiknev rajatis laevasõidu võimaldamiseks või vooluhulga reguleerimiseks, jaotamiseks ja mõõtmiseks
