Meaning of comaker

co•mak•er

Pronunciation: (kō-mā'kur, kō'mā"kur), [key]
— n. Finance.
  1. a person who formally undertakes to discharge the duties of the maker of an instrument, esp. a promissory note, in the event of the maker's default.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.