I. sluice 1 /sluːs/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Old French ; Origin: escluse , from Late Latin exclusa , from Latin excludere ; ⇨ ↑ exclude ]
a passage for water to flow through, with a special gate which can be opened or closed to control it
II. sluice 2 BrE AmE verb
1 . [transitive] to wash something with a lot of water
sluice something out/down
He was sluicing down the table and the floor.
2 . [intransitive always + adverb/preposition] if water sluices somewhere, a large amount of it suddenly flows there