plural cosigners
: a person who signs an official document (such as a loan, contract, or law) with another person
Both senators are cosigners of the bill.
: a person who cosigns something
My mother agreed to be a cosigner on my car loan.
Cite this Entry
“Cosigner.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/cosigner. Accessed 18 Apr. 2026.
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