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English definition of “millstone”

millstone

noun [C] uk   /ˈmɪl.stəʊn/ us    /-stoʊn/
one of a pair of large, circular, flat stones used, especially in the past, to crush grain to make flourToolsGardening tools
(Definition of millstone from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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