1. a person who writes their name on the back of a check, promissory note, or other negotiable instrument to transfer it or guarantee payment
Usage: legal/financial term; also spelled 'endorser'
2. a person who publicly supports or recommends a product, candidate, or cause
Usage: common in marketing and politics

Examples

• The indorser signed the back of the check to transfer it to another party.
• As an indorser of the promissory note, she became responsible if the original debtor failed to pay.
• The celebrity indorser appeared in advertisements for the new smartphone.
• Several prominent indorsers of the political candidate spoke at the rally.
• The bank required an indorser to guarantee the loan for the small business.
• He served as an indorser of the environmental initiative, lending his credibility to the cause.