English

Definition of weir noun from the Oxford Advanced Learner's Dictionary

 

weir

 noun
noun
BrE BrE//wɪə(r)//
 
; NAmE NAmE//wɪr//
 
Rivers and lakes
 
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a low wall or barrier built across a river in order to control the flow of water or change its direction Flood water was pouring over the weir in a thundering torrent. See related entries: Rivers and lakes Word Origin Old English wer, from werian ‘dam up’.
See the Oxford Advanced American Dictionary entry: weir