Etymology
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sluice (n.)

c. 1400, earlier scluse (mid-14c.), a shortening of Old French escluse "sluice, floodgate" (Modern French écluse), from Late Latin exclusa "barrier to shut out water" (in aqua exclusa "water shut out," i.e. separated from the river), from fem. singular of Latin exclusus, past participle of excludere "to shut out" (see exclude).

sluice (v.)

1590s, from sluice (n.). Related: Sluiced; sluicing.

updated on October 13, 2013

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Definitions of sluice from WordNet
1
sluice (v.)
pour as if from a sluice;
An aggressive tide sluiced across the barrier reef
Synonyms: sluice down
sluice (v.)
irrigate with water from a sluice;
sluice the earth
Synonyms: flush
sluice (v.)
transport in or send down a sluice;
sluice logs
sluice (v.)
draw through a sluice;
sluice water
2
sluice (n.)
conduit that carries a rapid flow of water controlled by a sluicegate;
Synonyms: sluiceway / penstock
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.