cosigner
- n one of two or more signers of the same document (as a treaty or declaration)
- n a signer in addition to the principal signer (to verify the authenticity of the principal signature or to provide surety)
- Says Leonard Fein, a cosigner of the letter and editor in chief of Moment, an independent Jewish monthly: "I expect that all the signers recognize that Elon Moreh is only the tip .
- He would draw checks on a special revolving "high school fund" by forging the name of the school board's secretary as cosigner.