a stone for sharpening cutlery or tools by friction.
anything that sharpens: a whetstone for dull wits.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use whetstone in a sentence
In 1557, the whetstone of Witte, an English algebra text, introduced the modern equal symbol.Take an online journey through the history of math | Erin Wayman | January 18, 2022 | Science News
When using a whetstone, you’ll have to flip the blade over to sharpen both sides, but it’ll work perfectly well.
There are electric sharpeners, two-stage hand sharpeners, and whetstones.
Even the best whetstones aren’t very expensive, but you can opt for a double-sided one for under $25.
The clever design of this knife sharpening stone allows you to simply flip the whetstone sharpener over to go from rough to fine.
He approved of Parpon, and never lost a chance of sharpening his humour on the dwarf's impish whetstone of a tongue.When Valmond Came to Pontiac, Complete | Gilbert Parker
Behind him, each of the natives had laid his stabbing-knife, skinning-knife, and whetstone.The Boy With the U. S. Fisheries | Francis Rolt-Wheeler
It's colder'n a blue whetstone, so put on all the clothes you've got.Wayside Courtships | Hamlin Garland
It is a profession which uses the conscience as a whetstone upon which to sharpen the intellect.The Incendiary | W. A. (William Augustine) Leahy
His firm and close-grained mind was a sort of whetstone on which my father sharpened his wits at this weekly setting.Spare Hours | John Brown
British Dictionary definitions for whetstone
a stone used for sharpening edged tools, knives, etc
something that sharpens
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