[{"Bold_text": "noun", "List Items": ["an official mark or stamp indicating a standard of purity, used in marking gold and silver articles assayed by the Goldsmiths' Company of London; plate mark.", "any mark or special indication of genuineness, good quality, etc.", "any distinguishing feature or characteristic:Accuracy is a hallmark of good scholarship."]}, {"Bold_text": "verb (used with object)", "List Items": ["to stamp or imprint (something) with a hallmark."]}]