v (rare) To emit by, or as by, flood gates. -Milton.
n An artificial passage for water, fitted with a valve or gate, as in a mill stream, for stopping or regulating the flow; also, a water gate or flood gate.
n Hence, an opening or channel through which anything flows; a source of supply.
n The stream flowing through a flood gate.
n (mining) A long box or trough through which water flows, -- used for washing auriferous earth.
v To wet copiously, as by opening a sluice; as, to sluice meadows. Howitt.
v To wash with, or in, a stream of water running through a sluice; as, to sluice earth or gold dust in a (w|sluice box) in (w|placer mining).