: solid material ejected into the air during a volcanic eruption
especially
: ash entry 2 sense 2b
Examples of tephra in a Sentence
Recent Examples on the Web
The tephra prompted temporary closures at the national park around the summit and a partial closure of Highway 11, an important route around the island, on either side of the park.
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Jessica Mekles, FOXNews.com, 13 Mar. 2026
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
Hawaii County officials also opened a shelter at a district gymnasium for residents and tourists impacted by the road closure or falling tephra.
—CBS News, 11 Mar. 2026
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Jessica Mekles, FOXNews.com, 13 Mar. 2026
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
Hawaii County officials also opened a shelter at a district gymnasium for residents and tourists impacted by the road closure or falling tephra.
—CBS News, 11 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 31 Mar. 2026.
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