cosigner

Noun cosigner has 2 senses

• cosigner(n = noun.person) cosignatory - one of two or more signers of the same document (as a treaty or declaration); Array
is a kind of signatory, signer
Derived form verb cosign₁

• cosigner(n = noun.person) Array - a signer in addition to the principal signer (to verify the authenticity of the principal signature or to provide surety); Array
is a kind of signatory, signer
Derived form verb cosign₂