tuff

1
[ tuhf ]
/ tʌf /

adjective Slang.

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Definition for tuff (2 of 2)

tuff2
[ 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 tuff

2
1560–70; <French tuf<Italian tufo.See tufa

OTHER WORDS FROM tuff

tuff·a·ceous [tuh-fey-shuhs], /tʌˈfeɪ ʃəs/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for tuff

British Dictionary definitions for tuff

tuff
/ (tʌf) /

noun

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 of tuff

tuffaceous (tʌˈfeɪʃəs), adjective

Word Origin for tuff

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

Scientific definitions for tuff

tuff
[ tŭf ]

A rock made up of particles of volcanic ash, varying in size from fine sand to coarse gravel.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.