\ ˈtəf How to pronounce tuff (audio) \

Definition of tuff

: a rock composed of the finer kinds of volcanic detritus usually fused together by heat

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Other Words from tuff

tuffaceous \ ˌtə-​ˈfā-​shəs How to pronounce tuff (audio) \ adjective

Examples of tuff in a Sentence

Recent Examples on the Web The area is known for its Bishop tuff — a type of rock formed by super-heated volcanic ash, which is of interest to researchers. Los Angeles Times, 19 July 2021 Fish Slough, a National Natural Landmark on the eastern edge of the tablelands, includes vivid petroglyphs chipped into bizarrely eroded volcanic tuff formations that overlook a verdant desert oasis laced with meandering spring-fed creeks. Los Angeles Times, 19 July 2021 For disposal in granite, clay and tuff formations the maximum allowable disposal density is determined by thermal limitations and most scenarios have waste canisters separated by about 8 feet. James Conca, Forbes, 27 Apr. 2021 The rock formation is what’s known as a tuff ring, which rises magnificently above all else around it. oregonlive, 21 Mar. 2021 This innovation, which uses a tuff of Poly-Fil and a dab of RTV silicone rubber, was quickly adopted, modified, and refined by users on Shroomery and Mycotopia and is now taught widely as an easy and reliable way to avoid contamination. Joanna Steinhardt, Wired, 12 Feb. 2021 And on the other side of the layer of tuff deposited by Toba (which argon isotope dating puts at 74,000 to 76,000 years old), the same stone tools keep showing up, uninterrupted by anything that looks like a sudden apocalyptic depopulation. Kiona N. Smith, Ars Technica, 26 Feb. 2020 Both items are made of tuff, carved from the Capitoline Hill that overlooks the Forum, and which is home to today’s City Hall. Washington Post, 21 Feb. 2020 Inside the Roman Forum new exciting archaeological discovery: a hypogeum with a tuff sarcophagus from the 6th century BC. Fox News, 19 Feb. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tuff.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tuff

1815, in the meaning defined above

History and Etymology for tuff

earlier tuph, tuft porous rock, from Middle French tuf, from Old Italian tufo

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Last Updated

5 Aug 2021

Cite this Entry

“Tuff.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tuff. Accessed 20 Sep. 2021.

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More from Merriam-Webster on tuff

Britannica English: Translation of tuff for Arabic Speakers

Britannica.com: Encyclopedia article about tuff


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