: a rock composed of the finer kinds of volcanic detritus usually fused together by heat
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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
Instantly, the summer heat of Rome was replaced by the cold, clammy air of tunnels that, like the Labyrinth of Rome, were first carved to mine tuff.
—Tony Perrottet, Smithsonian Magazine, 24 Mar. 2025
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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
Instantly, the summer heat of Rome was replaced by the cold, clammy air of tunnels that, like the Labyrinth of Rome, were first carved to mine tuff.
—Tony Perrottet, Smithsonian Magazine, 24 Mar. 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 7 Oct. 2025.
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