Definition of tuff in English:


Syllabification: tuff
Pronunciation: /təf


A light, porous rock formed by consolidation of volcanic ash.
More example sentences
  • Among the 30 different types of stone recognized are varieties of diorite, granite, bedded tuff, sandstones, limestones, and tufa.
  • Lenses incorporate varicoloured tuffaceous cherts intercalated with tuffaccous mudstone and tuff.
  • The lower series consists of alternating basalt lava, tuff breccia, tufite, and siliceous rock, whereas the upper one is dominated by diabase.


mid 16th century: via French from Italian tufo, from late Latin tofus, Latin tophus (see tophus).



Pronunciation: /təˈfāSHəs/
More example sentences
  • Further up section the geology is dominated by a succession of unmetamorphosed but strongly fractured and veined blocky andesites, basalts and tuffaceous rocks.
  • In addition, there are tuffaceous (volcanic ash) layers at various horizons throughout the Green River Formation.
  • Built of uniformly gray, granular volcanic tufa, or peperino, the courtyard was completed by 1579, as recorded in the building documents.

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