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- a mark stamped on articles of gold, silver, or platinum by the British assay offices, certifying their standard of purity（经英国检验机构检验, 在金、银或铂金制品上打的）纯度印记。
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- a distinctive feature, especially one of excellence（尤指表示品质优良的）特点, 特征：
the tiny bubbles are the hallmark of fine champagnes.
细微的气泡是优质香槟酒的特征。
with obj.
1- stamp with a hallmark给…打上纯度印记。
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- designate as distinctive, especially for excellence标明…具有优秀品质; 标明…具有某种特征。
词源
early 18th cent. (as a noun)： from Goldsmiths' Hall in London， where articles were tested and stamped with such a mark.