Sluice  —n. 1 (also sluice-gate, sluice-valve) sliding gate or other contrivance for regulating the volume or flow of water. 2 water so regulated. 3 (sluice-way) artificial water-channel, esp. For washing ore. 4 place for rinsing. 5 act of rinsing. —v. (-cing) 1 provide or wash with a sluice or sluices. 2 rinse, esp. With running water. 3 (foll. By out, away) wash out or away with a flow of water. 4 (of water) rush out (as if) from a sluice. [french escluse]