noun Geology.
a flow of mixed earth debris containing a large amount of water.
the dried-out product of such a flow.
Also called mud slide, mudspate.

1900–05; mud + flow Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
mudflow (ˈmʌdˌfləʊ)
geology a flow of soil or fine-grained sediment mixed with water down a steep unstable slope

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
mudflow   (mŭd'flō')  Pronunciation Key 
A downhill movement of soft, wet, unconsolidated earth and debris, made fluid by rain or melted snow and often building up great speed.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Persons can be swept away by a surge of water run off, mudflow, or debris flow.
Clay and water in the debris cause further change to a liquid slurry known as a
  debris flow or mudflow.
The danger from a mudflow increases near stream channels and with prolonged
  heavy rains.
Remember that flooding may occur after a mudflow or a landslide.
Image for mudflow
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