Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.

from The Century Dictionary.

  • noun A volcanic fragmental rock, varying from coarse deposits made of materials resembling fine gravel in size to those which are like the finest sand.
  • noun Same as tuft.
  • An old spelling of tough.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Min.) Same as tufa.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective older and simplified spelling of tough
  • noun geology A light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun hard volcanic rock composed of compacted volcanic ash

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[French tuf, from Old French, from Old Italian tufo, tufa; see tufa.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Old English tōh, from Proto-Germanic *tanhuz

from Wiktionary, Creative Commons Attribution/Share-Alike License

From French tuffe, tuf, from Italian tufo, from Latin tōfus.

Examples

Comments

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  • "Soon they are standing before the fort's entrance, which is flanked by carvings of a pair of guards cut into the foamy volcanic tuff: halberd-brandishing Spaniards in blousy pants and conquistador helmets."

    Cryptonomicon by Neal Stephenson, p 121 of the Avon Books paperback edition

    January 26, 2013

  • 1. n. Geology

    lithified volcanic ash.

    June 28, 2015