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Definition of Grindstone
1. Noun. A revolving stone shaped like a disk; used to grind or sharpen or polish edge tools.
Definition of Grindstone
1. n. A flat, circular stone, revolving on an axle, for grinding or sharpening tools, or shaping or smoothing objects.
Definition of Grindstone
1. Noun. An abrasive wheel for sharpening, polishing or grinding. ¹
¹ Source: wiktionary.com
Definition of Grindstone
1. [n -S]