noun, verb, sluiced, sluic⋅ing.| 1. | an artificial channel for conducting water, often fitted with a gate (sluice gate) at the upper end for regulating the flow. |
| 2. | the body of water held back or controlled by a sluice gate. |
| 3. | any contrivance for regulating a flow from or into a receptacle. |
| 4. | a channel, esp. one carrying off surplus water; drain. |
| 5. | a stream of surplus water. |
| 6. | an artificial stream or channel of water for moving solid matter: a lumbering sluice. |
| 7. | Also called sluice box. Mining. a long, sloping trough or the like, with grooves on the bottom, into which water is directed to separate gold from gravel or sand. |
| 8. | to let out (water) by or as if by opening a sluice. |
| 9. | to drain (a pond, lake, etc.) by or as if by opening a sluice. |
| 10. | to open a sluice upon. |
| 11. | to flush or cleanse with a rush of water: to sluice the decks of a boat. |
| 12. | Mining. to wash in a sluice. |
| 13. | to send (logs) down a sluiceway. |
| 14. | to flow or pour through or as if through a sluice. |
