01 n. Water turned back in its course by an obstruction, an opposing current, or the flow of the tide, as in a sewer or river channel, or across …
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1.
Water turned back in its course by an obstruction, an opposing current, or the flow of the tide, as in a sewer or river channel, or across a river bar.
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2.
An accumulation of water overflowing the low lands, caused by an obstruction.
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3.
Water thrown back by the turning of a waterwheel, or by the paddle wheels of a steamer.