- a fragmental rock consisting of the smaller kinds of volcanic detritus, as ash or cinder, usually more or less stratified.
Origin of tuff2
1560–70; < French tuf < Italian tufo. See tufa
Also called volcanic tuff.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for tuff
All of them, Tuff and Kellie and Clyde and Elsie, like to take this wherever they go: He died doing what he wanted to do.
“This is all we live for,” Tuff Hedeman was saying on the Astrodome floor, far removed from Willie and his friends.
Tuff and Tracie and Kellie lost count of the hours they spent waiting on Lane after the rodeos.
Like her last name would suggest, Tuff really has been through a lot.
Tuff cared for Derrick and his older sister, LaVita, while working two or three jobs at a time.
Tuff's coat was a heavy blue one that did for an overcoat, too.Tin-Types Taken in the Streets of New York
Lemuel Ely Quigg
Eocene, miocene, pliocene Tuff, Lias and Trias and that is enough.The Book of Humorous Verse
Some are of lava, others consist of ashes, still others of tuff and lava and ashes.The Andes of Southern Peru
On one side of the fountain a semicircular bench of tuff and terracotta.Mogens and Other Stories
Jens Peter Jacobsen
That tuff he considers a product of the latest eruption of the volcano.The Geological Evidence of The Antiquity of Man
- a rock formed by the fusing together on the ground of small rock fragments (less than 2 mm across) ejected from a volcano
C16: from Old French tuf, from Italian tufo; see tufa
Word Origin and History for tuff
advertiser's spelling of tough (adj.), attested by 1940.
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.