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English definition of “acre”

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noun [C] uk   /ˈeɪ.kər/ us    /-kɚ/
C2 a unit for measuring area, equal to 4,047 square metres or 4,840 square yards: He's got 400 acres of land in Russia.
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noun [C or U] uk   /-ɪdʒ/ us  
What acreage is (= how big is) her estate?
(Definition of acre from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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