: solid material ejected into the air during a volcanic eruption
especially
: ash entry 2 sense 2b
Examples of tephra in a Sentence
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The National Park Service has closed Kīlauea’s summit, citing danger from glassy volcanic fragments known as tephra.
—
Dennis Romero, NBC news, 11 Mar. 2026
This tephra fell not just over the volcano’s slopes, but over a nearby highway and residential areas.
—Owen Clarke, Outside, 11 Mar. 2026
But the lava fountains were creating trouble for neighboring communities and a highway where the volcanic fragments and ash, known as tephra, was falling.
—ABC News, 10 Mar. 2026
The United States Geological Survey said fallout had created hazardous conditions in downwind areas, with one resident reporting more than an inch of tephra — a mix of magma, rock and volcanic glass — on the roads of a golf course subdivision.
—Marc Ramirez, USA Today, 10 Mar. 2026
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Dennis Romero, NBC news, 11 Mar. 2026
This tephra fell not just over the volcano’s slopes, but over a nearby highway and residential areas.
—Owen Clarke, Outside, 11 Mar. 2026
But the lava fountains were creating trouble for neighboring communities and a highway where the volcanic fragments and ash, known as tephra, was falling.
—ABC News, 10 Mar. 2026
The United States Geological Survey said fallout had created hazardous conditions in downwind areas, with one resident reporting more than an inch of tephra — a mix of magma, rock and volcanic glass — on the roads of a golf course subdivision.
—Marc Ramirez, USA Today, 10 Mar. 2026
See All Example Sentences for tephra
Cite this Entry
“Tephra.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tephra. Accessed 15 Mar. 2026.
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