to co-sign
01
to sign a document jointly with another person or entity
예시들
Both partners co-signed the contract.
The committee chair co-signed the report with the secretary.
02
to sign a document in addition to another person's signature to guarantee a loan or financial obligation
예시들
She agreed to co-sign her friend's car loan.
Banks often require a parent to co-sign for a minor's credit card.
