TUFF meaning: Volcanic ash compressed into rock

We found 33 dictionaries that define the word Tuff:

General (20 matching dictionaries)

tuff: Oxford Learner's Dictionaries
tuff: American Heritage Dictionary of the English Language
tuff: Collins English Dictionary
tuff: Vocabulary.com
Tuff, tuff: Wordnik
Tuff, tuff: Wiktionary
tuff: Webster's New World College Dictionary, 4th Ed.
tuff: The Wordsmyth English Dictionary-Thesaurus
tuff: Infoplease Dictionary
tuff: Dictionary.com
tuff: Online Etymology Dictionary
Tuff (band), Tuff (disambiguation), Tuff (instrumental), Tuff: Wikipedia, the Free Encyclopedia
Tuff: Online Plain Text English Dictionary
tuff: Webster's Revised Unabridged, 1913 Edition
tuff: Rhymezone
Tuff: AllWords.com Multi-Lingual Dictionary
tuff: FreeDictionary.org
tuff: Mnemonic Dictionary
tuff: TheFreeDictionary.com
tuff: Merriam-Webster

Computing (1 matching dictionary)

Tuff (rock), tuff: Encyclopedia

Medicine (1 matching dictionary)

online medical dictionary (No longer online)

Miscellaneous (2 matching dictionaries)

TUFF: Acronym Finder
AbbreviationZ (No longer online)

Science (6 matching dictionaries)

Archaeology Wordsmith (No longer online)
Illustrated Glossary of Geologic Terms (No longer online)
Bryological (No longer online)
tuff: Dictionary of Geology
Anthropology dictionary (No longer online)
tuff: Natural History Terms

Slang (1 matching dictionary)

tuff, tuff: Green’s Dictionary of Slang

Tech (2 matching dictionaries)

tuff: Canadian Soil Information System
Schlumberger Oilfield Glossary (No longer online)

(Note: See tuffaceous as well.)

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Definitions from Wiktionary (tuff)

▸ noun:  (petrology) A light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.
▸ noun:  A surname.
▸ adjective:  Eye dialect spelling of tough. [(of a material) Strong and resilient; sturdy.]

Similar:

tuffite, tufa, peperino, metatuff, tectonite, chonite, tabby, eutaxite, trass, mudrock, more...

Phrases:

volcanic tuff, welded tuff, tuff cone, palagonite tuff, calc tuff, more...

Adjectives:

volcanic, welded, rhyolitic, crystal, white, grained, vitric, green, fine, andesitic, silicified

Colors:

charcoal, graphite, gunmetal, pewter, iron, more...

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