sign and endorse (another person's signature), as for a loan
同义词:co-sign
cosign详细解释
co.sign v.tr.(及物动词)co.signed,co.sign.ing,co.signs To sign (a document) jointly.共同签署(一个文件)To endorse (another`s signature), as for a loan.签署(另一方的签名),例如为贷款而签名 【引伸】 cosign.er n.(名词)