- 1[transitive] sluice something (down/out) sluice something (with something) to wash something with a stream of water The ship's crew was sluicing down the deck. I quickly sluiced my face with cold water.
- 2[intransitive] + adv./prep. (of water) to flow somewhere in large quantities Rain was sluicing down. Water came sluicing out of the house.
NAmE//slus//Verb Forms present simple I / you / we / they sluice
he / she / it sluices
past simple sluiced
-ing form sluicing