from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A control gate upstream of a lock or canal.
- n. A floodgate that controls the flow of water in a ditch, sluice, race, or channel.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. regulator consisting of a valve or gate that controls the rate of water flow through a sluice
- n. a gate upstream from a lock or canal that is used to control the flow of water at the upper end
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