This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A fence or wattle placed in a stream to catch or retain fish.

n. A dam placed across a river or canal to raise or divert the water, as for a millrace, or to regulate or measure the flow.

n. An adjustable dam placed across a river to regulate the flow of water downstream.

n. A fence placed across a river to catch fish.

n. A dam in a river to stop and raise the water, for the purpose of conducting it to a mill, forming a fish pond, or the like.

n. A fence of stakes, brushwood, or the like, set in a stream, tideway, or inlet of the sea, for taking fish.

n. A long notch with a horizontal edge, as in the top of a vertical plate or plank, through which water flows, -- used in measuring the quantity of flowing water.

n. A dam erected across a river to stop and raise the water, as for the purpose of taking fish, of conveying a stream to a mill, of maintaining the water at the level required for navigating it, or for purposes of irrigation.

n. A fence, as of twigs or stakes, set in a stream for catching fish.

n. a low dam built across a stream to raise its level or divert its flow

n. a fence or wattle built across a stream to catch or retain fish

"The weir is a single timber, below the surface, fixed obliquely across the stream on a shelving bank of masonry, and the farther end meets the wall of rock inside the cave."

wear   

dam    dike    dyke    fence    fencing   

dam    slat weir    shoal-water weir    lock-weir    weir measurement    flash-board weir    diversion weir    rated weir    drop-gate weir    bear-trap weir   

stop    goryd    lasher    hedge    waste   

Here    bier    blogosphere    buccaneer    disappear    ear    endear    hear    here    keir   

hatchery    cannery    spillway