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Definition of weir
1 : a fence or enclosure set in a waterway for taking fish
2 : a dam in a stream or river to raise the water level or divert its flow
People Are Reading
Recent Examples of weir from the Web
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As of Friday, 10,359 kings had passed the weir located at river Mile 7.
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An existing rock weir that diverts river water to an irrigation system for about 400 eastern Montana farms blocks their passage.
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Defenders of Wildlife and Natural Resources Defense Council sued the federal agencies in 2015 to remove the weir, leading the agencies to propose building a new dam and a bypass channel for the fish.
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DWR began drawing the lake down after the Feb. 12 crisis at the emergency spillway, when erosion in the hillside below the concrete weir threatened to collapse the structure and flood areas downstream.
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More than 180,000 people were evacuated over fears that the dam's weir would collapse and cause major flooding for communities downstream.
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The conceptual leap from weirs to a nine-story circular waterfall is what makes the whole project interesting.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'weir'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of weir
Middle English were, from Old English wer; akin to Old Norse ver fishing place, Old High German werien, werren to defend
WEIR Defined for English Language Learners
weir
playDefinition of weir for English Language Learners
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: a low wall or dam built across a stream or river to raise the level of the water or to change the direction of its flow
Learn More about weir
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See words that rhyme with weir Britannica.com: Encyclopedia article about weir
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