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A swift downhill current in water, air, or other fluid, triggered by the weight of suspended material such as silt in a current flowing down a continental shelf or snow in an avalanche.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Physical Geography) a swirling mass of water and suspended material stirred up by a tsunami, a storm, a river in flood, etc
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a turbid, dense current of sediments in suspension moving along the slope and bottom of a lake or ocean.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.