Millstones or mill stones are stones used in gristmills, used for triturating, crushing or, more specifically, grinding wheat or other grains. They are sometimes referred to as grindstones or grinding stones.

The meaning of MILLSTONE is either of two circular stones used for grinding something (such as grain). How to use millstone in a sentence.

/ ˈmɪlˌstoʊn / Add to word list one of a pair of large, circular, flat stones used, esp. in the past, to crush grain into flour (Definition of millstone from the Cambridge Academic Content Dictionary © …

For over 10,000 years, people across the world have been cutting and shaping pieces of stone into milling stones to grind wheat into flour. From the earliest times, small portable hand-milling stones …

Millstone, one of a pair of flat, round stones used for grinding grain. One millstone is stationary; the other rotates above it in a horizontal plane. Grain is poured through a hole in the centre of the rotating …

mill•stone (ˈmɪlˌstoʊn) n. 1. either of a pair of circular stones between which grain or another substance is ground, as in a mill. 2. anything that grinds or crushes. 3. any heavy mental or emotional burden: a …

MILLSTONE definition: either of a pair of circular stones between which grain or another substance is ground, as in a mill. See examples of millstone used in a sentence.

When the quarry became depleted, chunks of the stone were banded together to make a millstone. An industry grew up around hewing and shaping the valuable broken stones, cementing them together …

any heavy mental or emotional burden (often used in the phrase a millstone around one's neck)

In common language, "millstone" refers to any type of rock that may have been used in a mill, whereas in the geological sense, true "millstone" is defined as a siliceous accident in a sedimentary basin.