countersign

n. 口令、暗號、副署

vt. 副署、確認

學術名詞

• 連署：資訊
• 副署：海事

英文釋義

1. a secret word or phrase known only to a restricted group
2. a second confirming signature endorsing a document already signed
3. add one's signature to after another's to attest authenticity