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[tuhf] /tʌf/
adjective, Slang.
tough (def 13).


[tuhf] /tʌf/
noun, Geology
a fragmental rock consisting of the smaller kinds of volcanic detritus, as ash or cinder, usually more or less stratified.
Also called volcanic tuff.
Origin of tuff2
1560-70; < French tuf < Italian tufo. See tufa
Related forms
[tuh-fey-shuh s] /tʌˈfeɪ ʃəs/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for tuff
Contemporary Examples
Historical Examples
  • On leaving the coast we climbed some liparite and tuff rises, and then passed over a range of hills (Ferstikluhals) northward.

    Across Iceland William Bisiker
  • Eocene, miocene, pliocene tuff, Lias and Trias and that is enough.

  • Upon the oyster bed, again, is superimposed a second mass of lava, together with tuff or peperino.

  • Some are of lava, others consist of ashes, still others of tuff and lava and ashes.

  • The tuff is light and porous, and none of the bones penetrate into the more compact rock.

British Dictionary definitions for tuff


a rock formed by the fusing together on the ground of small rock fragments (less than 2 mm across) ejected from a volcano
Derived Forms
tuffaceous (tʌˈfeɪʃəs) adjective
Word Origin
C16: from Old French tuf, from Italian tufo; see tufa
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for tuff

advertiser's spelling of tough (adj.), attested by 1940.

Online Etymology Dictionary, © 2010 Douglas Harper
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tuff in Science
A rock made up of particles of volcanic ash, varying in size from fine sand to coarse gravel.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for tuff



Tired (1840s+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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