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tr.v. co·signed, co·sign·ing, co·signs
1. To sign (a document) jointly.
2. To endorse (another's signature), as for a loan.

co·sign′er n.


(Law) a cosignatory


(ˈkoʊˌsaɪ nər, koʊˈsaɪ-)

1. a cosignatory.
2. a joint signer of a negotiable instrument, esp. a promissory note.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cosigner - one of two or more signers of the same document (as a treaty or declaration)
signatory, signer - someone who signs and is bound by a document
2.cosigner - a signer in addition to the principal signer (to verify the authenticity of the principal signature or to provide surety)
signatory, signer - someone who signs and is bound by a document
References in periodicals archive ?
While no reasons were cited by the chief minister for the dismissal, the move may be explained by the fact that Notezai was among the cosigners of the no-confidence motion against Zehri.
The release is particularly advantageous for parents with several family members attending college, as well as for cosigners unable to take advantage of the current low interest rate environment due to their child's student debt.
Cosigners on that letter included ASTHO, Trust for America's Health and NACCHO.