n.

1. 品質證明；戳記；保證書
2. 標誌，特徵

vt.

1. 給……蓋上品質證明印記
2. 使具有……標誌

n.

1. a mark stamped on articles of gold, silver, or platinum by the British assay offices, certifying purity.
2. a distinctive feature, especially of excellence.

v.

1. stamp with a hallmark.
2. designate as distinctive.