Dictionary
cosigner
noun co·sign·er \ˈkō-ˌsī-nər\
: a person who signs an official document (such as a loan, contract, or law) with another person : a person who cosigns something
Full Definition of COSIGNER
: cosignatory; especially : a joint signer of a promissory note
— co·sign \ˈkō-ˌsīn\ verb
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First Known Use of COSIGNER
circa 1903
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