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English definition of “ballast”

ballast

noun [U] uk   /ˈbæl.əst/ us  
heavy matter such as sand or stone that is used at the bottom of a ship or a hot-air balloon to make it heavier, or the small stones on which railways and roads are made
(Definition of ballast from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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Translations of “ballast”

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