- An artificial channel for conducting water, with a valve or gate to regulate the flow: sluices connecting a reservoir with irrigated fields. (noun)
- A valve or gate used in such a channel; a floodgate: open sluices to flood a dry dock. Also called sluice gate. (noun)
- A body of water impounded behind a floodgate. (noun)
- A sluiceway. (noun)
- A long inclined trough, as for carrying logs or separating gold ore. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.