• Millstone

    Full definition of millstone

    Noun

    millstone

    (plural millstones)
    1. A large round stone used for grinding grain.
    2. (geology) A coarse-grained sandstone used for making such stones; millstone grit
    3. (figurative) A heavy responsibility that is difficult to bear.Paying the mortgage every month is a millstone round their necks.
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