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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.


1. (tr) to sign (a document) jointly
2. (Banking & Finance) (intr) banking to sign a document that has already been signed by a borrower of money, declaring that, should the borrower be unable to repay that money, the signer will repay the amount due


(ˈkoʊˌsaɪn, koʊˈsaɪn)

v.i., v.t.
to sign as a cosigner.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Verb1.cosign - sign jointly; "Husband and wife co-signed the lease"
validate, formalise, formalize - declare or make legally valid
2.cosign - sign and endorse (another person's signature), as for a loan
endorse, indorse - sign as evidence of legal transfer; "endorse cheques"
References in periodicals archive ?
For example, if you appear to owe thousands of dirhams for a loan that you cosigned and now in some trouble, you're less likely to get a loan yourself to pay a car or finance a home.
Drummey was a co-owner of the Falmouth property and cosigned the mortgage loan, but an investigation by the Boston Globe found the documents were in fact solely in the names of Mr.
Then a mere nine days after 9/11, PNAC leader William Kristol and 36 of the group's members cosigned a letter to Mr.