0 a large, round stone that is turned by a machine and is used to make tools sharper or sharp edges smooth --
1 a large, round stone that is turned by a machine and is used for making tools sharper --
I have had to keep my nose to the grindstone and work for my living.
I hope that you will now keep the foot to the grindstone.
He has his feet on the earth, and his nose on the grindstone.
Take, for instance, the grindstone or the abrasive wheel.
He has a very good, human way of holding our noses to the grindstone.
They have their noses to the grindstone, and they are not likely to take them off easily.
I regret that separate statistics respecting the number of unemployed grindstone quarrymen are not available.
People have their noses too near to the grindstone and are too busy working away to worry about intricate financial opportunities.
