The official stamp of the Goldsmiths' Company and other assay offices, in the United Kingdom, on gold and silver articles, attesting their purity. Also used figuratively; -- as, a word or phrase lacks the hall-mark of the best writers.
- A mark indicating quality or excellence.
- A mark used in England to stamp gold and silver articles that meet established standards of purity.
- A conspicuous feature or characteristic: "The sense of guilt is the hallmark of civilized humanity” ( Theodor Reik).
- To stamp (gold and silver articles) with a mark indicating purity.