n.

1. 品质证明；戳记；保证书
2. 标志，特征

vt.

1. 给……盖上品质证明印记
2. 使具有……标志

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.