A stone of a fine grit, or a slab, as of metal, covered with an abrading substance or powder, used for sharpening cutting instruments, and especially for setting razors; an oilstone
If you hone something, for example a skill, technique, idea, or product, you carefully develop it over a long period of time so that it is exactly right for your purpose. Leading companies spend time and money on honing the skills of senior managers
If you hone a blade, weapon, or tool, you sharpen it on a stone or with a special device. four grinding wheels for honing fine edged tools and implements. a thin, honed blade. = sharpen