Definition of co-sign in English:

co-sign

Syllabification: co-sign
Pronunciation: /ˈkōsīn
 
/

verb

1Sign (a document) in order to guarantee a loan or other obligation: [with object]: co-sign a loan [no object]: see if your parents will co-sign for you
More example sentences
  • Of course, a couple of years after that they'll be all over me to co-sign loans for the cars that their parents won't let them buy, so it'll all work out OK in the end.
  • I may, however, invoice her for 10, 500 CDs the first time she asks me to co-sign a loan.
  • The loan agreement was co-signed by the Finance Minister.
2 [with object] Designate with two different labels or signs: original interchange numbers will be co-signed with new numbers for two years after the conversion U.S. 400 is co-signed with U.S. 166 for about 8 miles

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