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Webster 1913 Edition
Millstone
Mill′stoneˊ
,Noun.
 One of two circular stones used for grinding grain or other substance in a mill{1}. 
No man shall take the nether or the upper 
millstone 
to pledge. Deut. xxiv. 6.
☞ The cellular siliceous rock called buhrstone is usually employed for millstones; also, some kinds of lava, as that Niedermendig, or other firm rock with rough texture. The surface of a millstone has usually a series of radial grooves in which the powdered material collects. 
Webster 1828 Edition
Millstone
MILL'STONE
,Noun.
  Definition 2025
millstone
millstone
English
Noun
millstone (plural millstones)
- A large round stone used for grinding grain.
- (geology) A coarse-grained sandstone used for making such stones; millstone grit
-  (figuratively) A heavy responsibility that is difficult to bear.
- Paying the mortgage every month is a millstone round their necks.
 
Derived terms
- see into a millstone, see through a millstone
Translations
large round stone used for grinding grain
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heavy responsibility
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