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TUFF

 - 4 dictionary results

tuff

1  [tuhf]
Use TUFF in a Sentence
–adjective Slang.
tough (def. 13).

tuff

2  [tuhf]
–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:
1560–70; < F tuf < It tufo. See tufa

Related forms:
tuff⋅a⋅ceous  [tuh-fey-shuhs] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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tuff   (tŭf)   
n.  A rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel. Also called tufa.

[French tuf, from Old French, from Old Italian tufo, tufa; see tufa.]
tuff·a'ceous (tŭ-fā'shəs) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

tuff 
1569, "rock of consolidated volcanic fragments," from M.Fr. tuf, from It. tufa "tufa, porous rock," probably from L. tufus, tophus (see tufa).
Online Etymology Dictionary, © 2001 Douglas Harper
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