cosigner

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. one of two or more signers of the same document (as a treaty or declaration) (Freq. 1)
• Syn:
cosignatory
• Derivationally related forms:
cosign
• Hypernyms:
signer, signatory
2. a signer in addition to the principal signer (to verify the authenticity of the principal signature or to provide surety)
• Derivationally related forms:
cosign
• Hypernyms:
signer, signatory