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English definition of “lead”

lead

noun [U] uk   /led/ us  

lead noun [U] (SUBSTANCE)

[U] (symbol Pb) a chemical element that is a very heavy, soft, dark grey, poisonous metal, used especially in the past on roofs and for pipes and also for protection against radiation: lead pipesChemical elements [C or U] (the narrow strip of) coloured material, usually black and made of graphite, in the centre of a pencilWriting implementsPainting and drawing materials
(Definition of lead noun from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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