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hallmark

noun [C] (MARK)
 
 
/ˈhɔːl.mɑːk/ US  /ˈhɑːl.mɑːrk/

Definition

in the UK, an official mark put on objects made of gold or silver that shows their place and year of origin and how pure the metal is that is used to make themMetals and metalworkingChemical elementsSpecific signs and symbolsSigns, signals and symbols
(Definition of hallmark noun (MARK) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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