: a moving mass of soil made fluid by rain or melting snow
also
: lahar
Examples of mudflow in a Sentence
Recent Examples on the Web
The seaside road routinely has closed because of rockslides, mudflows, flooding, wildfires and coastal erosion, most notably in Big Sur but also in several sections from Malibu up through the North Coast.
—
Grace Toohey,
Los Angeles Times,
27 Jan. 2026
Mandatory evacuations are in effect in some areas of Sierra Madre, which experienced mudflows in the Eaton Fire burn scar during heavy rain last month.
—
Patrick Smith,
NBC News,
13 Mar. 2025
Extensive mudflows also buried much of Topanga Canyon Boulevard, which will likely take days or weeks to clear.
—
Nathaniel Percy,
Daily News,
14 Feb. 2025
All this explosive activity also triggered mudflows that traveled tens of miles down the river valleys leading from the volcano's many glaciers.
—
Erik Klemetti,
Discover Magazine,
20 May 2024
See All Example Sentences for mudflow
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Grace Toohey,
Los Angeles Times,
27 Jan. 2026
Mandatory evacuations are in effect in some areas of Sierra Madre, which experienced mudflows in the Eaton Fire burn scar during heavy rain last month.
—
Patrick Smith,
NBC News,
13 Mar. 2025
Extensive mudflows also buried much of Topanga Canyon Boulevard, which will likely take days or weeks to clear.
—
Nathaniel Percy,
Daily News,
14 Feb. 2025
All this explosive activity also triggered mudflows that traveled tens of miles down the river valleys leading from the volcano's many glaciers.
—
Erik Klemetti,
Discover Magazine,
20 May 2024
See All Example Sentences for mudflow
Cite this Entry
“Mudflow.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mudflow. Accessed 5 Jul. 2026.
Copy CitationKids Definition
mudflow
noun
mud·flow
ˈməd-ˌflō 
: a moving mass of mud made up of soil and rainwater or melted snow
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