: a rock composed of the finer kinds of volcanic detritus usually fused together by heat
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About 95 percent of them were carved out of tuff ejected from volcano Rano Raraku.
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Laura Baisas, Popular Science, 8 Oct. 2025
Altitudes range from 400-700m and contain varying quantities of volcanic tuff and calcareous clays.
—Paul Caputo, Forbes.com, 31 Aug. 2025
Others are more roughly hewn from tuff, a soft volcanic rock from which the famous Seven Hills of Rome are formed.
—Antonia Mortensen, CNN Money, 23 July 2025
Limestone brick arches alternate with smooth tuff walls, some pockmarked, while others are chiseled with geometric shapes.
—Helen Iatrou, Travel + Leisure, 2 July 2025
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Laura Baisas, Popular Science, 8 Oct. 2025
Altitudes range from 400-700m and contain varying quantities of volcanic tuff and calcareous clays.
—Paul Caputo, Forbes.com, 31 Aug. 2025
Others are more roughly hewn from tuff, a soft volcanic rock from which the famous Seven Hills of Rome are formed.
—Antonia Mortensen, CNN Money, 23 July 2025
Limestone brick arches alternate with smooth tuff walls, some pockmarked, while others are chiseled with geometric shapes.
—Helen Iatrou, Travel + Leisure, 2 July 2025
See All Example Sentences for tuff
Cite this Entry
“Tuff.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tuff. Accessed 15 Oct. 2025.
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