weir: meaning, definition, pronunciation and examples
C2technical / regional / historical / literary
Quick answer
What does “weir” mean?
A low dam built across a river to raise the water level or divert its flow.
Audio
Pronunciation
Definition
Meaning and Definition
A low dam built across a river to raise the water level or divert its flow.
Any barrier, dam, or fence set in a stream to catch fish or measure or control the flow of water.
Dialectal Variation
British vs American Usage
Differences
The word is understood in both varieties but is more likely to be encountered in British English, especially in geographical contexts and place names near rivers.
Connotations
In both varieties, it connotes rural settings, water management, and historical infrastructure. In the US, 'dam' is the more generic and common term.
Frequency
Higher frequency in UK English due to prevalence in topography and historical water management. In the US, it is primarily a technical term.
Grammar
How to Use “weir” in a Sentence
The weir [verb] (e.g., controls, diverts, traps)[Noun] weir (e.g., fishing weir)weir across/in the [River Name]Vocabulary
Collocations
Examples
Examples of “weir” in a Sentence
verb
British English
- The estate plans to weir the stream to create a trout pond.
- The old channel had been weired off centuries ago.
American English
- The project will weir the creek for irrigation purposes.
adjective
British English
- The weir gate was stuck.
- We took a weir-side path.
American English
- The weir structure needed repair.
Usage
Meaning in Context
Business
Rare. Potentially in contexts of hydroelectric power, water resource management, or environmental consulting.
Academic
Common in hydrology, environmental science, engineering, and historical geography papers.
Everyday
Rare. Likely only used by people living near one, in boating contexts, or in historical discussion.
Technical
Standard term in civil engineering, fisheries management, and river ecology.
Watch out
Common Mistakes When Using “weir”
- Misspelling as 'wier'. Confusing with 'weird' (different pronunciation: /wɪəd/ vs /wɪə/). Using 'dam' interchangeably (a dam is typically larger and for impounding water; a weir often allows water to flow over its crest).
FAQ
Frequently Asked Questions
A dam is usually a higher barrier that creates a large reservoir by impounding water. A weir is typically lower, often allowing water to flow freely over its crest, and is used for flow measurement, diversion, or fishing.
No, it is a low-frequency word outside of technical, geographical, or historical contexts. You will most often encounter it in place names or specific discussions about rivers.
It is pronounced like 'weer' (/wɪər/ in UK, /wɪr/ in US). It rhymes with 'beer' and 'pier'. Be careful not to confuse it with 'weird' (/wɪəd/).
Yes, though it is rare. To 'weir' a stream means to build a weir across it, usually for diverting water or creating a fish pond.
A low dam built across a river to raise the water level or divert its flow.
Weir is usually technical / regional / historical / literary in register.
Phrases
Idioms & Phrases
- “go over the weir (rare, meaning to go past a point of no return)”
Learning
Memory Aids
Mnemonic
Think: 'WE' build a 'WEIR' across the river to control the water hERE.
Conceptual Metaphor
A WEIR is a BARRIER / FILTER / MEASURING DEVICE (e.g., 'a weir of bureaucracy').
Practice
Quiz
What is the primary purpose of a traditional fishing weir?