grindstone Hear it!

grindstone definition

grind·stone (grīnd′stōn′)

noun

  1. Now Rare a millstone
  2. a revolving stone disk for sharpening bladed tools or shaping and polishing things
grindstone Idioms

keep one's nose to the grindstone

or have one's nose to the grindstone or put one's nose to the grindstone
to work hard and steadily

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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