from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A mark indicating quality or excellence.
- n. A mark used in England to stamp gold and silver articles that meet established standards of purity.
- n. A conspicuous feature or characteristic: "The sense of guilt is the hallmark of civilized humanity” ( Theodor Reik).
- transitive v. To stamp (gold and silver articles) with a mark indicating purity.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A distinguishing characteristic.
- n. An official marking made by a trusted party, usually an assay office, on items made of precious metals.
- v. To provide or stamp with a hallmark
After Goldsmith's Hall in London, England, where gold and silver articles were appraised and stamped.(American Heritage® Dictionary of the English Language, Fourth Edition)