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floodgate

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flood⋅gate

[fluhd-geyt]
–noun
1. Civil Engineering. a gate designed to regulate the flow of water.
2. anything serving to control the indiscriminate flow or passage of something.

Origin:
1175–1225; ME; see flood, gate
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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flood·gate   (flŭd'gāt')   
n.  
  1. A gate used to control the flow of a body of water. Also called water gate.

  2. Something that restrains a flood or outpouring: The ruling opened the floodgates to refugees seeking asylum.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Legal Dictionary

Main Entry: flood·gate
Function: noun
: something serving to restrain an outburst (as of litigation) —usually used in pl. floodgates for other claims>
Encyclopedia

floodgate

gate for shutting out or releasing the flow of water over spillways, in connection with the operation of a dam. Vertical lift, or radial, gates rise to permit flow under the gate but over the spillway crest. Drum gates rotate backward, lowering their tops and permitting a measured flow over the top of the gate. Drum gates present the fewest problems in the passage of ice or drift over the spillway.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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